Digital BW, The Print

Douglas Meeuwsen wrote:
> I was just having a heck of a time trying to get two prints to match 
> tone. (Ut2 on a 1280). One is velvet fine art, and the other photo rag. 
> I made about 6 prints trying the get the photo rag not to warmer than 
> the velvet.....then I figured out that the velvet print was in a frame 
> under glass. I was using identical matt boards, and I had the matt 
> laying over the the PR print. The velvet print was 12x15, and the PH.R 
> print was 8x10. Finally figured it out when I laid the smaller print on 
> top of the larger mounted print and saw that the glass had totally 
> changed the color of the matt board. The print under glass looked 
> better. (The reason one had glass and the other did not was because I 
> broke it.....).....so anyway, I never hear much about the effect of 
> glass on the color of a print. this is cheap glass from michaels, so 
> maybe that is an issue also.......DM

Different paper with the same ink, might always result in a different 
tone and colour response, that's the main reason behind different 
papers.  The age of the print, also will affect the tone, including 
where it hangs.  Glass itself, if completely clean, will not affect a 
print, but chemical gasses, given off by the ink, paper, matt board, 
adhesives and frame materials, might all affect it.  When cleaning the 
glass, don't use window cleaner, it adds to the chemical soup that will 
be trapped inside (instead use a good quality dish soap, rinse well, and 
give it a dip in distilled water before leaving it to air dry).

W