How do I print a booklet with a colour cover but with black and white inside pages?

Question

Hi there,
I need to print a large amount of booklets, which have a colour cover but are grayscale on the inside. However, I am having trouble setting up my document to successfully do this and I am unsure if it is something I can change in InDesign or if it is something I should figure out with my printer driver?
We used Page Plus for these booklets in the past and were able to do this with the same printer, so that makes me think there might be setting I could change in InDesign to achieve the same result.
It integral that the printer knows that the inside pages of the booklet are black and white, as we get charged per copy for colour printing and it is vastly increasing our printing costs.
My coworker believed that exporting the file as a PDF with the options: Colour Conversions (convert to destination - Pressure Numbers), Destination (sRGB IEC61966-2.1), and Profile Inclusion Policy (Don't Include Profiles) is making a difference. However, I don't believe is is the case.
If anyone had another suggestion that I could try, that'd be great!!

Answer 1

@Eugene – do you have details for "Export as Grayscale"?
I tried with the following details:
Target-Profile: Dot Gain 15%
Convert to Target Profile
Include Target Profile
If I do it this way I get:
Target Profile not included
Wrong numbers for my colors
(I tested with a self-made color wedge on the page for the percentages of Black shown below)
Seen in Acrobat Pro 10 with proof simulation "Dot Gain 15%":
100 % Black => 100 %
80 % Black => 82 %
60 % Black => 63 %
40 % Black => 43 %
20 % Black => 22 %
I could convert to "Dot Gain 15%" in Acrobat Pro's Preflight Panel, but this would show the same wrong percentages (just tested).
What I can do, however, is printing to PostScript with color separations, only color channel Black.
That would work, if I chose a Distiller setting, that will not change the color, to convert my separated PostScript file to PDF.
Seen in Acrobat Pro 10* with proof simulation "Dot Gain 15%" or any of the other available gray scale profiles.
(Acrobat Pro 11 might get this wrong due to a bug)
100 % Black => 100 %
80 % Black => 80 %
60 % Black => 60 %
40 % Black => 40 %
20 % Black => 20 %
This separated PDF (channel Black only) can now be converted with a self-made correction* in Acrobat Pro's Preflight Panel to a gray scale PDF/X-1a.
If done right * the color values stay as defined in inDesign.
Output in my case:
PDF/X-1a
OI: GrayScale profile Black ink of ISO Coated v2 300%
Tested with:
InDesign CC 2014.2
Distiller X
Acrobat Pro X
Mac OSX 10.7.5
Uwe
* There are several, convoluted steps necessary to get this (hope, I can remember them all):
Not optional:
Have a grayscale profile representing the channel Black of your intended output CMYK or generate one!
In my case the base CMYK profile was: ISO Coated v2 300%.
And I got a "Black Ink of ISO Coated v2 300%" profile for Grayscale conversions by generating this with my PhotoShop app.
Maybe optional, but helpful:
Change the color settings of Acrobat Pro X to use the color settings file you generated in PhotoShop where:
Grayscale is defined as the black channel of ISO Coated v2 300%: "Black Ink of ISO Coated v2 300%"
Mandatory, but somehow tricky:
Then on to the Preflight Panel of Acrobat Pro to generate a custom preflight profile.
None of the ordinary ones will fit exactly (at least in my Acrobat Pro X).
1. Make a duplicate of an already stored Preflight profile that converts color to Gray. Name it appropriately.
2. Include a single correction for converting to Gray Scale (at this time, or if you do something like that the first time, it's not possible to change or duplicate that single correction)
3. Save your new profile. Close the profile.
4. Open the profile again.
5. Now, suddenly it's possible to duplicate that single correction (converting to Gray Scale).
Do some changes, appropriate correction options, eg. adding "Black Ink of ISO Coated v2 300%" as OI to the PDFs you will convert.
4. Use that duplicate single correction in your new Preflight profile.
5. Save your custom preflight profile.