U of S | Mailing List Archive | alt-photo-process-l | correction (Re: Dark reaction)

correction (Re: Dark reaction)

On Oct 29, 2009, at 7:02 AM, Katharine Thayer wrote:

A graph illustrating the relationship between relative humidity and time in hours required to produce a specific degree of hardening in a dichromated gum layer, shows the dark reaction taking 1100 hours at 50% RH and 0 hours at 85% RH.
Slip of the finger: that should read *110* hours at 50% RH, not 100 hours. The relationship is steep, but not THAT steep. Sorry, about that.