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Bruce, Well if you are a risk taker (h2 is very
dangerous) your times are very short indeed.
If I remember correctly at temps of about 40c TP in pure H2 is about 5
hours. I did this once while at the TSP
as I had run out of hypered film. A guy had a tank of H2 and we
hypered TP for 5 h with daytime heat only. Ok it was around 102f peak temp. If I remember my old Kodak article on hypering it would be 30c at 10h for a max density of 0.3. Using the concept that every 7c = ½ time that
gives about 5h at 40c. That is just a
guess. -
h2 times
are very short and not consistent if I remember correctly because slight temp
shifts cause major time differences -
in a
controlled environment this is possible to make quick batches though -
it is explosive! Even slight sparks cause catastrophic results
(the Hindenburg effect) I would not do it, but then again I drink
lots of coffee, and am considered dangerous with cutting tools J -----Original Message----- how would you alter the hyper
times if hypering in pure hydrogen? --- --- |