Bitmaps will be much smaller than Greyscale. I'll bet you a 600dpi 
Bitmap will be only 1/16 tp 1/8 of your greyscale file size.

But you will need to rescan at the higher resolution ( I am assuming we 
are talking about line art here, not tone images).

Britt


Linda Feltner wrote:
> Dear Britt, Wendy, Janet and Alice:
>
> I've tried every sort of combo I could to try to get Illustrator to 
> colorize to a designated PMS swatch color. Tried eps files, jpegs, and 
> tiffs. Tried grayscale, rgb and cmyk. The only ones it worked on were 
> grayscale. So, in my previous jobs, I must have been using grayscale 
> tiffs. That's all I've been able to find in archives.
>
> I bet it would work on bitmap, but for size reasons I think I'd better 
> stick with the 150 dpi tiffs (90MB) that the manufacture recommended. 
> Since there are two 64" borders on each panel.
>
> I think working in grayscale will be fine, why not?
> I was just thinking for some reason that it would work on a rgb/cmyk tiff.
> I may have been thinking of the times past, that I must have colorized 
> them in Photoshop (and used various layers), and the more I think 
> about it, the more that is likely.
>
> Many thanks,
> Linda