Halftones

I was working in Photoshop and trying to resize an image to fit into the the Large Album iPhoto book. Photoshop's Image Resize Assistant asked me which halftone screen (LPI) will be used to print the image. It offered me the choice of 65, 85, 133, 150, 200 and Other. The default choice was 133. I've seen a lot of discussion regarding halftones. I don't what it means but am wondering number I should enter.

I'm afraid I need some time to digest your information. It's above my head right now. But while doing that, maybe I can further explain what I'm attempting to do. I have a flyer that is 6"wx11"h. I scanned the image at 600x600 pixels per inch. When I imported that image to iphoto the info read at 4.9MB @ 3618 pixelsx6592pixels. The issue I had was this: When I moved the image as scanned into my Folio album, I couldn't see the whole image. I had to cut the top off or the bottom text off.
Rescanning the image at a "smaller" size, just left me with fewer pixels which is what I think you are referring to.
My second approach was this: I re-opened the image scanned at 600x600 pixels per inch in PS. In PS, there was this Resize Image option under the Help Menu that let me type in the new size I wanted. I chose the height at 8.5 b/c that is the height of the large book. It then asked me what halftone the image would be printed at which point I had to turn to the AD board. I chose a custom setting at 300 thinking that this might eliminate some of the issues I've seen on the boards about print quality but since I don't really even understand what halftones are, I just took the newbie approach that it couldn't hurt to have a higher number. Btw, this assistant did make the image fit into the book!

Similar Messages

  • How can I use a halftone screen printing file to simulate the final output?

    Just a little history to help with the understanding.  I am working with a company that silk screens a pattern onto a solid color board.  The patterns are saved as .sct extension but are flattened.  I am trying to emulate the screening process by layering the halftone pattern over a solid color but can't seem to make it work.  The "white" that was filled in on the pattern is creating the issue.  If anyone knows how I can get this layer back to a transparency or any other trick to achieve the results I need, I would appreciate it.
    This is a small .png of the halftone file I am working with.  I am using CS5.
    Thanks,

    Here you go.  You can't really see what happened here but as per your instructions, I selected the "ink" layer and Alt-Clicked the Mask icon.  Then I highlighted the actual mask of that layer and pasted the "pattern" that I had previously copied.  This pasted the pattern into another layer above the ink layer.  Here is a graphic for it.

  • Is it possible to customize the halftone screen/angle used by the HP Laserjet 5000/5100

    Hi
    When sending an image to print on our 5000s and 5100s I'd like for the printer to apply a halftone screen of 85 (frequency) and 45 (angle). However, the driver properties only has two settings - Standard and Enhanced.
    I took a look at the PPD and found the following:
    *%=== Halftone Information =================
    *ScreenFreq:  "106.0"
    *ScreenAngle: "45.0"
    *ResScreenFreq 300dpi/300 dpi:  "60.0"
    *ResScreenAngle 300dpi/300 dpi: "45.0"
    *ResScreenFreq 600dpi/600 dpi:  "106.0"
    *ResScreenAngle 600dpi/600 dpi: "45.0"
    *ResScreenFreq 1200dpi/1200 dpi:  "180.0"
    *ResScreenAngle 1200dpi/1200 dpi: "45.0"
    I had hoped that simply by changing the screen frequencies to "85.0" it would do the trick (since 85 does not appear to be outside of the printers' capability). However, it resulted in no changes to the prints. I know (or at least think) the changes were "seen" by the print driver because I changed some of the text that it uses in the property boxes of the print driver and those changes appeared (e.g. I changed "Standard" to "Standard 2" for one of the halftone descriptions).
    My question is... can I customize the frequency/angle used or are these values fixed regardless of changes made to the PPD?
    Thank you.
    Mark

    What was the answer to this excellent question, please?
    Mark
    Student
    Posts: 1
    Registered: 05-14-2009
    0
    Is it possible to customize the halftone screen/angle used by the HP Laserjet 5000/5100
    Options 
    05-14-2009 06:56 AM
    Hi
    When sending an image to print on our 5000s and 5100s I'd like for the printer to apply a halftone screen of 85 (frequency) and 45 (angle). However, the driver properties only has two settings - Standard and Enhanced.
    I took a look at the PPD and found the following:
    *%=== Halftone Information =================
    *ScreenFreq:  "106.0"
    *ScreenAngle: "45.0"
    *ResScreenFreq 300dpi/300 dpi:  "60.0"
    *ResScreenAngle 300dpi/300 dpi: "45.0"
    *ResScreenFreq 600dpi/600 dpi:  "106.0"
    *ResScreenAngle 600dpi/600 dpi: "45.0"
    *ResScreenFreq 1200dpi/1200 dpi:  "180.0"
    *ResScreenAngle 1200dpi/1200 dpi: "45.0"
    I had hoped that simply by changing the screen frequencies to "85.0" it would do the trick (since 85 does not appear to be outside of the printers' capability). However, it resulted in no changes to the prints. I know (or at least think) the changes were "seen" by the print driver because I changed some of the text that it uses in the property boxes of the print driver and those changes appeared (e.g. I changed "Standard" to "Standard 2" for one of the halftone descriptions).
    My question is... can I customize the frequency/angle used or are these values fixed regardless of changes made to the PPD?
    Thank you.

  • Where did the halftone screen settings go?

    I've just downloaded Photoshop CS5 and am desperately seeking the halftone screen settings. It used to be in the print dialogue, but it's no more there. Where did it go? And yes, I have chosen a PostScript printer.

    Found 'em.

  • Photoshop CS6 bug report - creating halftone

    Error occurred when creating a 4 color half tone separation.
    I opened a PDF image file 300dpi CMYK and in the channels palet > Split Channels
    I then chose the first channel (Magenta) and did the following...
    Image > Mode > Bitmap with the settings Input: 300 px/in Output 99.999 px/in, Method: Halftone Screen, Frequency: 53, Angle: 45, Shape: Round
    The result is a mess.
    Every time it looks a little different but what I see is that the halftone seems to have been applied to most of the image but the image was also sliced up and rearranged.
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       Twirl 13.0, Copyright © 2003-2012 Adobe Systems Incorporated - from the file “Standard Multiplugin.plugin”
       U3D 13.0 20120305.m.415 2012/03/05:21:00:00  ©2006-2012 Adobe Systems Incorporated - from the file “U3D.plugin”
       Underpainting 13.0, Copyright © 1991-2012 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Vanishing Point 13.0, Copyright © 2003-2012 Adobe Systems Incorporated - from the file “VanishingPoint.plugin”
       Variance 13.0 20120305.m.415 2012/03/05:21:00:00  ©2006-2012 Adobe Systems Incorporated - from the file “statistics.plugin”
       Water Paper 13.0, Copyright © 1991-2012 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Watercolor 13.0, Copyright © 1991-2012 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Wave 13.0, Copyright © 2003-2012 Adobe Systems Incorporated - from the file “Standard Multiplugin.plugin”
       Wavefront|OBJ 13.0 20120305.m.415 2012/03/05:21:00:00  ©2006-2012 Adobe Systems Incorporated - from the file “U3D.plugin”
       Wind 13.0, Copyright © 2003-2012 Adobe Systems Incorporated - from the file “Standard Multiplugin.plugin”
       Wireless Bitmap 13.0 20120305.m.415 2012/03/05:21:00:00  ©1989-2012 Adobe Systems Incorporated - from the file “WBMP.plugin”
       ZigZag 13.0, Copyright © 2003-2012 Adobe Systems Incorporated - from the file “Standard Multiplugin.plugin”
    Optional and third party plug-ins:
       Accented Edges 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Angled Strokes 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Bas Relief 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Chalk & Charcoal 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Charcoal 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Chrome 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Color Efex Pro 4 4.000, Copyright © 2000-2011 Nik Software Inc. - from the file “Color Efex Pro 4.plugin”
       Colored Pencil 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Conté Crayon 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Craquelure 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Crop and Straighten Photos 12.0.4x20110407 [20110407.r.1265 2011/04/07:02:00:00 cutoff; r branch]  ©2003-2010 Adobe Systems Incorporated - from the file “CropPhotosAuto.plugin”
       Crosshatch 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Cutout 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Dark Strokes 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Diffuse Glow 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Dry Brush 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Embed Watermark NO VERSION - from the file “DigiSign.plugin”
       Film Grain 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Filter Gallery 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Fresco 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Glass 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Glowing Edges 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Grain 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Graphic Pen 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Halftone Pattern 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       HDR Efex Pro 1.200, Copyright © 2000-2011 Nik Software Inc. - from the file “HDR Efex Pro Tonemapping.plugin”
       HDR Efex Pro Metadata 1.200, Copyright © 2000-2011 Nik Software Inc. - from the file “HDR Efex Pro Metadata.plugin”
       HDRMergeUI 12.0, Copyright © 2003-2010 Adobe Systems Incorporated - from the file “HDRMergeUI.plugin”
       Ink Outlines 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Merge to HDR Efex Pro 1.200, Copyright © 2000-2011 Nik Software Inc. - from the file “HDR Efex Pro Automation.plugin”
       Mosaic Tiles 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Neon Glow 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Nik Selective Tool 2.100, Copyright © 2000-2011 Nik Software Inc. - from the file “SelectivePalette.plugin”
       Note Paper 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Ocean Ripple 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Paint Daubs 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Palette Knife 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Patchwork 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Photocopy 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       PhotoTune 3 3.0.8 (Suite 5.5.3), Copyright © 2011 onOne Software.  All rights reserved. - from the file “PhotoTune.plugin”
       PhotoTune 3 Batch 3.0.8, Copyright © 2011 onOne Software.  All rights reserved. - from the file “PhotoTune Batch.plugin”
       PhotoTune 3 Filter 3.0.8 (Suite 5.5.3), Copyright © 2011 onOne Software.  All rights reserved. - from the file “PhotoTune Filter Stub.plugin”
       Plaster 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Plastic Wrap 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Poster Edges 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Read Watermark NO VERSION - from the file “DigiRead.plugin”
       Reticulation 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Rough Pastels 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Smudge Stick 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Spatter 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Sponge 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Sprayed Strokes 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Stained Glass 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Stamp 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Sumi-e 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Texturizer 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Torn Edges 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Underpainting 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Water Paper 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
       Watercolor 12.0, Copyright © 1991-2010 Adobe Systems Incorporated - from the file “Filter Gallery.plugin”
    Plug-ins that failed to load: NONE
    Flash:
       Watermark
       onOne
       Mini Bridge
       Kuler
    Installed TWAIN devices: NONE

    I can't reproduce that with a normal CS6 install.
    But I see that you copied many of the plugins from CS5 into CS6 -- and those will cause conflicts.
    Remove all the plugins that you copied from CS5 and try again.
    Also, this could be related to document dimensions -- could you tell us the exact pixel dimensions of the images that fail?

  • The ability to output halftones (separations) and set screen angles, etc., from the CS5 print dialog

    I output films from photoshop that are used to expose silkscreens.  often, i output halftones and up until CS5 i've done this from the print dialog where i can also set my screen angles and dot shapes, press print and off it goes to my printer.  It has been suggested to me in the photoshop macintosh forum that i might simply build a script to convert the individual channels to bitmaps at the printer resolution, angle, shape and then print that.  unfortunately, this method results in less accurate screens and fails to take advantage of what my postscript printer can do.  this is the only reason i have a postscript capable printer.  i used this workaround method before i bought the postcript printer and the results just weren't very good.
    my workaround is to keep CS3 installed and print from that.  this is a hassle and less than optimal.  i was quite surprised to find that this "feature" which has been available in photoshop for many years suddently disappeared.  please give some thought to bringing it back.  i expect that i'm not the only shop that's going to miss it.
    you can see some commentary on this in the ps mac forum.  look for "setting line screen in CS5."
    kenb

    Hey Ken, I personally haven't used that feature in years but it was 
    very useful when printing separations for t-shirts so I feel for ya. I 
    noticed it's still in CS4 if that helps. Also, you may try 
    experimenting with the following filters:
    RGB FILES:
    Filter > Sketch > Halftone Pattern
    RGB or CMYK FILES:
    Filter > Pixelate > Color Halftone
    GRAYSCALE FILES:
    Image > Mode > Bitmap > Method > Halftone Screen
    Also, InDesign allows you to print custom screen angles and line 
    rulings but not dot shape.
    Good luck!
    Terry

  • Halftones in Elements 12

    Hi at all,
    I want to create haltones and have seen a video of how to do this (but don't know the photoshop version which is beeing used – I use Elements 12). The guy in this video can create halftones by change the mode to bitmap. On the bottom of the window where you can choose between different option you have one to decide if you want to get halftones and if you say so you can decide between different types of halftones and so on.
    When I change my picture into bitmap, I can't decide what I want to do. Yeah, I get some halftones, but can't decide which and if I get done with my „decision“ my layer is fixed, I can't do anything (I also don't understand why this is so).
    I know, that I can make some halftones by using effects, but I only get big circles and not the kind I want.
    To summarise my question, I want to get a Layer with halftones which I can use to get some shadows in my picture like in the video.
    I hope you can help me!
    Here is the video I had been watched at 9:40 is the part of changing into halftones http://www.qwertee.com/blog/2013/nov/04/26/

    Thank you very much for your response!
    Thats right, they only look like halftones but I need them. I want to draw a picture with a limited amount of Colours, so this kind of halftones would be a good thing. And I already come so far with my picture and put so much time on it and to learn how to make it, that I want to do the finish too
    Now I'm a little bit confused. I thought Photoshop Elements would be Photoshop. If it isn't so, what program do make halftones? Or what program do I need?
    For now I'm testing out different testversions, so testing another should be (hopefully) no problem. I would ask Adobe on my own what I need, if I could contact them. But I couldn’t so I have to ask here.
    I hope you can help me out again

  • How do I manipulate color after changing an image to halftone with bitmap in Photoshop CS5 and CS6?

    Hi,
    I'm just starting to play with turning into images into halftone image. So far I've learned how to do it 2 ways: 1) using the Pixelate>Halftone filter and 2)Converting the image to grayscale then bitmap>halftone. After either technique, I'm a little lost on how to best changel color - not as whole but to convert different section to different colors - kind of Andy Warhold look. I've tried the history brush. I've dragged it into illustrator (which I tried live trace). But I'm not quite getting the flexibility of just painting different areas different colors. Also, what angles work best to avoid strange grid effects?
    Any techniques or inside advice would be greatly approciated! Thanks, Andrea

    Why not apply the halftone to a duplicate layer, that way, you still retain the colors, you can then allow some or all of the colors to show through, using blend modes, masks or opacity changes.

  • Preserve Halftone Information--Check or Don't Check?

    I have a client that is about to send their manuals to press. We are not sure whether to select Preserve Halftone Information in the Distiller .joboptions file or not.
    We are using FrameMaker 9 (unstructured), and the rest of the specified .joboptions settings are as follows:
    Distiller v. 9.0
    Compatibility:                          Acrobat 8.0 (PDF 1.3)
    Color Images:                         Compression- Automatic, Quality- High
    Compress Text:                      On (but I couldn't find this setting)
    Color Conversion:                   Tag Everything
    RGB Profile:                           sRGB IEC61966-2.1
    CMYK Profile:                         U.S. Web Coated (SWOP) v2
    The client asked about the halftone information, and I thought that I should probably find some more information.
    Thanks,
    Karen

    AFIK the Preserve Halftone Info setting will only apply to EPS files, as
    that's the only format I know of that may contain Halftone info. That's one
    of the reasons I stay away from EPS files for bitmap images (unless they
    require clipping paths)
    In any case, if you haven't set EPS files to use a specific halftone
    setting, it shouldn't make a difference. I doubt leaving it on will cause
    any problems, and your commercial printer would be the best resource for
    this question!
    -Matt

  • Acrobat 7.0 prints halftone background in jpegs.

    When I print a Microsoft Publisher file to pdf in Acrobat 7.0 Professional there is a halftone background on 
    all jpegs.  This does not happen with another computer using the same version of acrobat and the same printer.

    I have tried but when I try to install the downloaded up
    date I get the error messaage "Missing source media. (Error 1612)" and do not know
    how to resolve that.

  • How do I place on ID a halftone image made in PS and keep the halftone?

    I'm really not finding anything about this, so i'm starting to think I can't do it. I'm using CS5. Here it goes:
    I'm making a magazine layout as a college excercise. I want to use halftone images in one or two ink (some only black, others only cyan, or magenta, or both, etc) for this and I want the halftone to be noticeable but not so big that it turns my photo into an abtract image or a weird Lichtenstein. To try it, I grabbed one of the images in PS, separated the channels in different layers, used the halftone effect and got exactly what I wanted.
    The thing is, when I place it on ID, it looks like... well, really bad. I already tried with High quality display.
    Other things I tried:
    Placing the image as both JPG and PSD. (No difference)
    Exporting (printing) to PDF and looking at the result (really bad).
    I haven't tried printing it on paper yet, but I assume it shouldn't change much, right? And i haven't tried with different dot sizes either, I'm going for that now.
    FYI, this is for single digital printing, and not offset, it won't be sent to a printer.
    Any help, advices or comments will be much appreciated. Any grammar correctiosn will be appreciated to, as english is secon language to me.
    This is the PS image (Screen print kills it a bit)
      And this is the PDF output.

    In addition to Peter's suggestion, the halftoned bitmap is line art so it needs more resolution to accurately draw the dots. So:
    If you add color ideally it should be 100% value combinations so you don't have a printer screen interfering. Above is 100% magenta back with 100%cyan+100%magenta for the halftone line art

  • Halftone or Line art figure

    Is it possible to find whether a figure is Halftone or Line art using scripting.
    thanks,         
    Sashi

    Are you referring to the documentMode bitmap (1bit depth) as opposed to grayscale/rgb or do you mean checking whether any pixels in a grayscale- or rgb-image have values other than 0 or 256?
    In first case a simple if-clause works:
    if (app.activeDocument.mode == "DocumentMode.BITMAP") {
      alert ("bitmap")
    else {
      alert ("not bitmap")
    In second case you might use the histogram.
    Though your use of the term »figure« seems a bit odd to me – are you talking about an image or part of an image?

  • Grayscale & Halftone Printing

    I get very good results with RGB to CMYK conversions using Photoshop.  I am satisfied with the final halftone reproduction compared to the image that I see on the monitor 99.9% of the time.  I do not get the same results with grayscale images reproduced as halftones. While they are not true grayscale prints, the inkjet prints of grayscale images that I print from Photoshop always look good.  However when I see the final publication 20-30% of the halftone images will look dull. Is there some way to better visualize with Photoshop what a grayscale image will look like when printed in halftone?

    Mostly, the Gray Profile is the problem. Don't use just the convention
    Gamma=2.2 or the guess DotGain=20%, but a reliable profile, which
    is derived from the CMYK profile for the final process. For instance:
    Edit > Color Settings > Load > Select U.S.WebCoatedSWAP
    As a result you'll get the Gray Profile
    Black Ink - U.S.WebCoated (SWOP) v2
    Now choose this profile by View > Proof Setup > Custom and work
    with Soft Proofing: View > Proof Colors.
    Make the gray image either by Grayscale, followed by contrast and
    brightness adjustments.
    Or use Image > Adjustments > Channel Mixer, mode Monochrome.
    I don't trust the grayscale workflow at all. InDesign doesn't honor
    Gray Profiles (but it doesn't ruin the image, it just shows the result
    sometimes wrong).
    Therefore I would paste the optimized Grayscale into the K-channel
    of an otherwise void CMYK image. Thus we get a compatible CMYK
    file for the hopefully correctly assumed CMYK process.
    One can find excellent advice in this book:
    Dan Margulis , Photoshop Lab color.
    http://www.amazon.de/s/ref=nb_sb_noss?__mk_de_DE=%C5M%C5Z%D5%D1&url=search-alias%3Daps&fie ld-keywords=Dan+Margulis+Lab&x=0&y=0
    I'm still working with CS2. I would be glad if somebody could correct
    me, if the guidelines should have changed meanwhile (e.g. InDesign's
    sometimes wrong gray preview)
    Best regards --Gernot Hoffmann

  • Halftones and resolution settings - why and reasons?

    I am taking continuous tone images, color and B&W, converting to greyscale then halftone dots so that the images will print better via desktop laser printer of some dpi value output.
    Photoshop applies a Bitmap resolution, then asks for and 'Output' resolution.
    The dot style menu then asks for a dot resolution value.
    I understand that the smaller dpi produces a more contrasty, newspaper type image.  Conversley, a higher dpi will allow for a better gradation of tonality, but may block up depending on the reproduction method.
    Do these two resolution values correlate? 
    Are you resampling the Bitmap resolution when you input a different value?
    Will a higher Bitmap resolution provide greater tonal range if using a higher dpi?
    Since the printer output will define how well a particular dot will be built up during printing, is there a relationship or method for entering dpi values that will provide a good output?
    Thanks, Leadmann12

    Can't you control DPI and LPI in the printer settings without destroying the image in Photoshop? You are making Photoshop do something it should not need to do.
    The difference that you observe in newspaper images relates to lower LPI, not necessarily a change in DPI.
    http://en.wikipedia.org/wiki/Lines_per_inch

  • Silk Screen and Halftone dots

    What is the short answer to, "Can Illustrator allow the user to control the size of halftone dots?" Just to be clear, for silk screen, the dots must be course. I have read several posts on the subject and still there is no definitive answer. The PPD file has been loaded. The document is a CMYK. In the print menu the separation menu has only very fine settings available (The lowest is 56 lpi/300dpi) which if selected makes very little to no difference in the dot patterns.
         Just to reduce confusion, often a silk screen printer will try to get two colors for the price of one. The simplest example would be to get Black & Gray with one screen. If I set the Gray to 50% and the Black to 100%, still no change. If I use spot colors like PMS Cool Gray and Black, no change. Moving the files into Photoshop may work but fundamentally speaking PhotoShop in my opinion is for constant tone images or Photos, and it seems counter productive to add in a extra step (and software) to the work flow.
         I like to stick to the old K.I.S.S. motto. Keep It Simple Stupid. In this case less is better. Other software packages make this task a no brainer. I like Illustrator and have invested hundreds of hours learning and promoting it's virtues. When I was asked by a local shop how to do this task, I responded, (Oh I'm sure its just a setting that needs to be set.) Well, not so. So, Can I do this or do I need to tell my associate to keep using CorelDraw! 7...

    Wow, you guys have been having quite a conversation while I was sleeping!  I'll address a few comments here and there:
    A silver disc with a 25% purple halftone will just look silver with a purple hue.
    That's exactly the effect I'm after - I'm hoping it will look cool.
    Also keep in mind that any time you have a screen printed halftone you
    will be able to see the little dots that make up that halftone.
    Yes, I know.  As idea-starters I have been looking at CDs/DVDs that I own that have been silkscreened, and I decided to pursue a semi-transparent halftone because I like how it looked in someone else's design (in that case it was blue rather than purple, and I don't know what percentage coverage, but I'm trusting my imagination to take me the rest of the way).  That halftone was about 42 lpi, and I could even see how small text looked on it, so I would be happy with anything at least that fine or finer.  I also ran across a label whose whole background was a halftone gradient between completely tan and completely black, and all the "foreground" elements like text and logos were the clear silver - the halftone was only 25 lpi, no doubt to try to improve the quality of the dots in the low percentages.  Whoever designed it probably thought it was nice-looking, but I didn't - not only isn't the gradient very smooth, but although transparent text on the black or almost black areas were easily readable, to read the stuff that is in the mostly tan areas I had to tilt the disk to reflect more light.  Frankly, the only halftones I really like in the examples I have seen are ones with only one color - when they try to blend two inks by making the screen angles different, it doesn't look as clean to me.  Plus, I simply like the look of utilizing the silver - it's an effect unique to silkscreen on CD/DVD disks, not found in offset labels or silkscreen on other materials.
    You also mentioned a custom white.
    Not really a custom white - the replicator's literature about what is included with replication said "silkscreen in three colors (counting white) or offset" - actually at the moment I can't find where it said "counting white", so perhaps I can choose my own three colors, but whatever I read originally seemed to say that one of my three colors had to be white, so I was designing based on that assumption.
    I'm using spot colors for everything in my Illustrator file, so it should be very clear to the replicator what objects should be what color.  I really wish the swatches in Illustrator would actually control the color of the instances that use them, like swatches and styles in InDesign work, but unfortunately when I experiment with changing the swatch to a different shade, I have to then select each object one at a time and tell it to use the swatch again - cumbersome.
    I also would name a background color "silver of the disc" just so there cannot be any confusion.
    Currently my background layer is simply transparent, and for my own visualization the next layer has an image of a shiny CD surface that I found on the internet - I turn that layer on when I want to see a fake idea of how the shiny silver will look with the rest of my design.  A link to a old copy of my Illustrator file is in post #19 of this thread, and here is a JPG of how it looks with the fake shiny background image (the content on my label has progressed since those files was made, but the color ideas are roughly the same).
    So, are you telling us the Screen Printer (replicator) is not providing
    some sort of Proof to show you what the your art files will look like
    when printed?
    I don't know - I didn't ask whether the prepress work is being done at their small facility here in town or in Taiwan.  I'm smarter now, so next time I talk to them I'll ask.
    It's actually pretty difficult to show what a printed silver disc will look like on white paper.
    I agree - that's why I put that image in my Illustrator file so that I could simulate the effect a little.  I know that proofs on paper will look different, and that even my simulation is not real, but I'm doing my best to imagine the end result, and I'm not all that picky as look as it looks nice and the text is readable.  One challenge is that my logo (whose real colors are totally different - see my PR page for both the logo and the jacket design with which I'm trying to coordinate) modified for use on the label has both white and purple in it, so the semi-transparent shade needs to be sufficiently distinguishable from both such that the logo shows up nicely.
    Also, the song titles are currently white, but I'm flexible - they could be purple, silver (i.e. completely transparent), or cream - whatever would show up well.  I chose white because I noticed on other examples in my music collection that when text is a solid version of one of the colors involved in a halftone background (which in this case would apply to both purple and transparent silver), the dots touching the edges of the text made it look sloppy and a little hard to read.  For the logo it's unavoidable because I need multiple colors, but the song title text is only one color, so I thought white would be safest.
    By the way, I also plan to make the DVD logo and other things I add on the left transparent, not white as you see the DVD logo now.  I'm waiting until the last minute to combine the paths with the purple area to make that happen, because after I do that, moving those items around or changing their size would be difficult or next to impossible.
    I have found presenting clients with separations only confuses them.
    I wouldn't be surprised.  But in my case I am the client and the artist, so I would fully understand separations.
    We also offer samples of what we have printed in the past
    and do offer check discs to see what the art will look like printed on
    the disc.
    My replicator offers a full-service check disk if I want to pay for it, including not just the label but the data as well (the first disk pressed from the glass master), but it costs $60, adds significantly to the turnaround time (it is made in Taiwan, of course), and the guy said that most clients don't opt for it unless they have a really big run (mine is only 1000 copies, so I'm in the very small category).
    Thanks to both of you for all the great conversation!

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