On Tue, Jul 7, 2009 at 3:50 PM, Piotr Kopszak <kopszak@gmail.com> wrote:

> Hello list,
>
> 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) ?
>
Did you seen
http://www.libtiff.org



-- 
luigi