Another kallitype note

[Sandy King <sanking@clemson.edu>]

Some time back someone on the list, Shannon I believe, had a question 
about fogging of the paper when developing either kallitype or 
vandyke in daylight. This had not previously happened with me but for 
some reason it now has. This past weekend I made a large vandyke from 
a 20X24 negative, and processes it as I normally do: 2 minute wash, 5 
minutes in platinum toner, 2 minutes in 5% sodium thiosulfate fixer, 
2 minutes in 1% sodium sulfite, then wash in running water on deck in 
afternoon shade. After about 15 minutes the print developed a very 
noticeable stain, or fog. The stain reached a certain point, which I 
have subsequently measured as about log 0.03, and did not progress 
any further. I am really mystified by this and have no idea as to the 
cause.

Comments anyone?

Sandy King


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