Blue gels and Pt contrast

Richard Sullivan (richsul@roadrunner.com)
Thu, 19 Feb 1998 10:37:39 -0700

I just had a conversation with James DuSel who related that he is having
quite bit of success with using a blue gel when printing palladium to
increase contrast in the print. he says he gets at least on paper grade
increase and a decrease in time of maybe one stop or more. The gel is one
supplied with lights to convert them from tungsten to daylight.

I think we wobbled through this territory a year of so ago but as I recall
the conversation was in regards to green glass. DuSel also says that blue
gel has no contrast effect on the Ziatype but does change its color.

Another interseting observation he has made concerns print times and
contrast. He says he got a Palladio light bank and his time went to 1/4 of
what they were before but the contrast went way down. We suspect that the
contrast may in fact be related to the print times and that the blue gel
just increases the print times which in effect, increase the contrast.

What say the List?

--Dick Sullivan

Bostick & Sullivan
PO Box 16639, Santa Fe
NM 87506
505-474-0890 FAX 505-474-2857
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