Digital BW, The Print

I've been using Heavyweight Matte for a full year and have not noticed 
any yellowing on any of my prints.

-m

Phil Rose wrote:

> There have been numerous threads and discussion about Epson Archival/
> Enhanced Matte versus Matte Paper Heavyweight. The consensus is that 
> EAM and
> EEM are identical and contain an optical brightening agent (OBA), a 
> result
> of which these papers undergo some "yellowing" as the OBA degrades 
> with age.
>
> Matte Paper Heavyweight (HWM) is similar to EAM/EEM, but since the HWM
> has a distinctly lower brightness rating than the other two, I have 
> believed that
> it does not contain OBA. But what about its tendency to yellow with 
> age (HWM
> yellowing presumably would be caused by its acidic nature)? Since I 
> can't recall seeing
> anecdotal evidence for yellowing of _any_ of these matte papers, I've 
> assumed the
> process is fairly slow (some period of _years_).
>
> Well yesterday I had occasion to make a test B&W print using my 
> favorite paper for
> B&W printing, which is Matte Paper Heavyweight. When I compared the 
> fresh HWM
> print with one I had made in August, 2003, I was startled to see that 
> the paper
> (margin) of the 6-month old print was quite noticeably yellowed. The 
> older (August)
> print had been kept in a small pile of loosely stacked 
> prints--shielded from light for
> the vast majority of that brief time. The new print's paper was from a 
> polyethylene
> envelope in a 50-sht box--the same package of paper used for earlier 
> print. When I
> began comparing the new print to other HWM prints made within the past 
> year, it was
> clear that _all_ had lost some "visual" whiteness. I tried to do a 
> side-by-side scan of
> two prints to show the relative change in paper "color", but it was 
> unable to show any
> difference (as measured by Photoshop eyedropper.) But by eye 
> (daylight), the change
> was unmistakable. Since HWM has been in use for several years, I'm 
> surprised I've not
> seen reports of similar (and even worse) changes with this paper. Is 
> this rapid
> yellowing (within few months) actually a well-known aspect of HWM?
>
> Phil
>
>
>
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