Re: Selenium Intensifier

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From: nze christian (christian_nze@hotmail.com)
Date: 06/13/02-05:56:54 AM Z


I found this on internet @
http://www.astro.wisc.edu/~mukluk/misc.html#anchor1

hope this help

"Chromium Intensifier
Saves somewhat underexposed negatives.
For drastically underexposed negatives, this will make highlights (if any)
heavier.
Stock solutions:
Solution A - 10% solution potassium bichromate
Solution B - 10% solution hydrochloric acid
Working solutions may be mixed in different strengths:
10 parts A 20 parts A 20 parts A
2 parts B 10 parts B 40 parts B
100 parts water 100 parts water 100 parts water
Or, a stock solution may be made of:
3 ounces potassium bichromate to 32 ounces water and
2 ounces hydrochloric acid to 32 ounces water.
Make working solution from 1 part stock and
10 parts water.
Stock solutions will last a long time in full bottles in dark.
Mix only enough working solution to use in one day.
Work in weak daylight or artificial light.
Bleach until all black disappears.
Wash about 5 minutes until yellow stain is gone.
Redevelop in a non-staining developer. (D-76 works. You may want to dilute
developer 1:2 or 1:3.)
Rinse.
Fix 5 minutes.
Wash as usual.
Repeat process if necessary. ""

Amicalement

Nzé Christian
mailto:christian_nze@hotmail.com
http://www.c-nze.com

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