From: Sandy King (sanking@hubcap.clemson.edu)
Date: 02/28/01-04:39:46 AM Z
Nzé Christian wrote:
>Hi all,
>
>Sure pyrocatechol give a stainign but the color of this stain is more black
>than yellow green. And Carl, you will loose the "possibility" to print your
>neg in platinum or on classic bromide paper.
>Pyrocatechol also got the same tanning effect as his cousins pyrogallol.
>
>regards
>Amicalement
>
>Nzé Christian
That is not my experience. The stain I get with the Pyrocat formula is not
black at all but very similar to what I get with PMK and ABC+. It is
*slightly* less intense and the color is more greenish brown than the
yellow green you get with PMK and ABC+ but it acts just as effectively as
an actinic filter for UV light with alt processes and with VC papers. In
fact, I find it is slightly *more* effective as an actinic filter for UV,
which of course makes sense since brown is more effective than green at
blocking UV light.
Sandy King
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