Halftone Screen & Transparency

I have imported two grayscale TIFF photos (of silhouetted
objects on a white background) into Freehand. I then applied the
"Halftone Screen" round dot pattern each. My problem is: I'm trying
to overlap the two images without the white backgrounds showing --
in essense, I want to apply a "Multiply"-like filter effect (used
in Photoshop/InDesign/Illustrator). The "Transparency" option isn't
working the way I want -- it screens back the halftone images.
Rather, I'm trying to retain the values of the halftone screened
image, while allowing the second image underneath to be visible
(for example, as if you were placing blue acetate over yellow
acetate to creating a green color where the two overlap).
In addition, is it possible to raster or convert a Halftone
Screened image to vector art?
Many thanks!

kdholland wrote:
> I'm trying to overlap the two images without the
> white backgrounds showing -- in essense, I want to apply
a "Multiply"-like
> filter effect (used in Photoshop/InDesign/Illustrator).
FreeHand doesn't offer much in the way of transparency
controls for print
production. You can use the 'Transparent' checkbox in the
object inspector
window. This works best with a 1-bit TIFF. It will convert
grayscale to
black and white pixels, and you can adjust threshold level by
using the
levels control -- the icon for the dialog is beside
Transparent checkbox.
What is the intended output? If it's for printing to a
Postscript device,
you can set the fill color of the upper image to Overprint.
The drawback is
that you won't be able to preview the transparency in FH.
> In addition, is it possible to raster or convert a
Halftone Screened image to
> vector art?
If you create a very high resolution image, you can use the
Trace Tool to
trace it. You'll need about 48 pixels per row of dots. See
the recent
discussion on this forum titled, "create a dithering with big
dots (like 6
ppp)".
Judy Arndt

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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"
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*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.

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A digital duplicator is essentially the same as a printing press in as much as a microwave oven is essentially the same as a toaster.
There will be no plate made; the device will create the halftone pattern as part of its imaging process. You do not need to concern over creating the halftone yourself.

Cs5 photoshop halftone screen button ? gone ?

cs5 photoshop halftone screen button ? gone ?

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05/08/2010.
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Noon on Friday. If you have an emergency you may call:
Craig Wright - 704-770-4501
Thanks!
For questions on FirstForms, please email the Firstforms Mailbox.
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use the OPS-ESS-FM-TTeam distribution list.
For all other general forms issues/questions please use the general
assistance request on FirstForms (http://firstforms.wachovia.net).
Thanks!
Missy

New printer: Ricoh aficio 6330n, halftone screen freq. stays at about 106lpi. PS driver 6.0.0

Ricoh aficio 6330n, halftone screen freq. stays at about 106 lpi no matter what I set in print output section. InDesign CS3. PS driver 6.0.0

In general, most PostScript personal and network printers totally ignore screening settings set in the PostScript file itself and either use “secret sauce” screening or require operator panel controls to adjust screening. Contact Ricoh for further support on this.
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Halftone Screen Printing (Rosette)

Hey all,
I'm pretty new to prepress / prepping for screen printing, and I need some help.
After MAJOR searching and downloading trials of plugins, I'm stuck in finding out how to get a CMYK separation with halftone dots for printing. We are printing on a clear plastic film, and I was asked to convert a design into a 4-color (CMYK) Rosette screen for the screen printer.
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Am I doing something wrong? Has anyone else ran into this problem using Photoshop's Bitmap settings?
We are using Photoshop CS6.
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Cheers!

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Screen transparency doesn't knock out black fully in InDesign

I started experiencing a situation in which the "screen" transparency function doesn't knock out the black background of a logo fully. The black instead of becoming fully transparent shows the background color in a lighter shade. The "multiply" function however works perfectly.
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I'm pretty good at reading between the lines, but I have no idea what you are doing, so perhaps you'd provide some more details, and some screen shots. You can embed an image in a post by using the camera icon on the web page like this:
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Try moving the iMac to a different location in your home and running it to see if the problem recurs.

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Reprinting image with halftone screen

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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.
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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

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