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since Blurb switched to the Indigo I haven’t had any B&W problems. Before that I got a cyan cast.
Of course the printed book is not the same as an inkjet print or the screen, it is darker. I did a test book with 3 different darknesses of several images to figure out what I wanted to do. I ended up going with the lightest version, which I would not print myself. Looks great.
The glossy cover is a slightly different color from the pages though—-quite annoying. I read someplace about Blurb maybe switching from gloss to semi gloss for the softback covers. That would be nice.
Re the various profiles mentioned in some of your other posts: the profile should not make a difference except where the colors are out of gamut for a particular profile, and not at all for B&W. The conversions between profiles can make a difference though. Conversions are approximations, and it is especially a problem if conversions are piled on top of conversions, still for B&W… Since Blurb converts to sSRG (which seems strange to me) that is what I submit thereby saving one conversion. If I were to submit Indigo profiles and Blurb converts to sRGB and then the press back to Indigo, something could be lost.
My original files are mostly grayscale, though some are ProPhoto. One problem I initially had with scanning B&W before I learned better was assuming that a scan of a B&W negative into a color space, Adobe RGB for example, would be B&W. It looks that way on the screen but I was being foolish. Took a while to figure out too, where the color casts were coming from :) The scanner of course adds it own subtle “color”.
I have used the Indigo profile to soft proof on my monitor, and in inkjet prints. On the monitor it is fairly subtle, but noticeable.
Scott
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