Digital BW, The Print

Hi all, yesterday I ran into a problem using the MIS VM inks that I 
never had seen after several hundred prints. Background: I am doing a 
large restoration job with old photos. After scanniing several as 
grayscale, retouching and printing with no problem I scanned some in 
as RGB. These photos had faded to sepia quite a bit. I thought I 
wouldn't have to change them to RGB to print. After retouching and 
printing the photos were awfull. No detail in the 10-20%, just a blob 
of light gray. After severaal hours of nozzle check, purge patterns 
could find nothing. Printed one of the earlier pic, perfect. 
Looking at the 2 files on screen the only diff was the sepia tone. 
Converted the sepia to gray, converted it back it RGB and applied the 
curves and it printed great, this after several hours and many prints.
SO BEWARE, the file cannot have any color what so ever before appling 
the curves.
I hope this helps anyone that might run into this problem.


Vinny
http://www.wulfsden.com