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Public Lab Research note


NU Darkroom Setup

by Clarke_Brian | February 12, 2013 20:07 12 Feb 20:07 | #5958 | #5958

Today Sara and I set up a darkroom at Northeastern University. We prepared fixer in order to make a batch of hydrogen sulfide sensing strips using photographic paper. Fixer is diluted in a 1:10 ratio with water. Fill graduated measuring cup to bottom line with fixer, fill cup to second line with water. To check viability of fixer, add a few drops of hypo-chek. If solution is cloudy, fixer is no longer usable. Fixer is hazardous waste and must be labeled as such and disposed of in the waste container.


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