2014.03.21 23:39 "Re: [Tiff] Spot colors in TIFF", by Chris Cox

Photoshop writes layer data, and descriptions of the additional alpha channels in application specific TIFF tags that most other applications won't read.

PDF and PSD/PSB are the only other formats that really support spot colors. DCS/EPS can hold spot channels, but only for final output - it's not that portable.

Chris

On 3/21/14 4:28 PM, "Oncaphillis" <oncaphillis@snafu.de> wrote:

I'll have to generate images in CMYK+SpotColor format (e.g PANTONE etc.) format and would like to store in TIFF. Photoshop supports this kind of data but I couldn't find anything about the TIFF file organisation. All tools I used under linux seem to ignore the additional layers. Some just complain about an unknown TAG 37724 (0x935c) for which I couldn't find anything usefull.

tiffsplit doesn't split the tiffs at all, so it doesn't seem to be a multi-layer TIFF.

Are there any informations available for this format? Alternatively it would be o.k. for me to use another bitmap image format supported by other paint programs which supports spot colors for which better docs are acailable.