Re: Duotones with spot colors

[Piotr Kopszak <kopszak@gmail.com>]

Many thanks for all replies,

Well, maybe someone comes up with a solution one day. It would be nice
to have a complete Photoshop-less production environment on linux.
BTW, can tif support spot colors at all, I haven't found any mention
of that anywhere, hence I don't think libtiff might be of use.

Piotr

2009/7/7 William Adams <will.adams@frycomm.com>:
> On Jul 7, 2009, at 9:50 AM, Piotr Kopszak wrote:
>
>> I am preparing for a next project which will be printed in two
>> colours. Obviously, perfect opportunity to use duotones. However I got
>> my duotone illustrations in CMYK tiffs with images in yellow and black
>> channels. Obviously black could stay but I would like to convert the
>> yellow channel to the spot colour I am going to use. Any ideas
>> (without using Photoshop) ?
>
> Leave the images be, set the things you want to appear in the spot colour as
> yellow, then tell the printer that the yellow plate is the spot colour and
> to suppress cyan and magenta.
>
> Or use the spot colour and tell the printer to merge the yellow plate w/ the
> spot colour (check first --- while all RIPs should be able to do this, not
> all printers will be willing to).
>
> Or use Enfocus PitStop to post-process the .pdf.
>
> However, unless the spot colour is _very_ light, I doubt that you'll be able
> to use the images as is --- they'll probably print too dark, so you'll need
> to process them anyway. I'd make a PhotoShop action to convert the images to
> multi-channel, then change the yellow plate to the spot colour, then apply a
> curve to lighten the spot colour, then save the image (but make sure you
> keep an original), then I'd use a second action to review all of the files
> on a calibrated monitor, tweaking as necessary and going back to original
> images at need.
>
> William
>
>
> --
> William Adams
> senior graphic designer
> Fry Communications
> Sphinx of black quartz, judge my vow.
>
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