From: Katharine Thayer (kthayer@pacifier.com)
Date: 11/09/01-10:42:45 AM Z
Sandy King wrote:
>
Mixed with distilled water a dichromate solution will give
> identical sensitivity and contrast over a period of several years.
>
This doesn't quite jive with my experience. I've always used distilled
water to mix my dichromate, and I generally use 200 ml of solution in a
short enough period of time that it doesn't change enough to be
noticeable, but there was one time when I didn't make any prints for six
months, and when I started working again, I found that the ammonium
dichromate (carefully stored in an opaque brown bottle) had changed
sensitivity enough that I had to throw it out and start fresh. So I'm om
agreement with Judy on the dichromate changing sensitivity over time.
kt
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