View Full Version : t55 polaroid film-defects
question regarding polaroid t55 film-- over the weekend, an imprompt shooting si tuation left me to put exposed t55 film in water for several hours before i imm ersed the film in sodium carbonate. the result has been puzzeling. one batch of film cleared and looked normal as i have done this once before. the second b atch of film did not clear. a blackened image remained and the emulsion was very soft and became unattached to the gelatine film base. the dating on the film wa s 3/98-- a few months over the recommended time. is this the problem? thank yo u for your answers.
This might be completely offbase but is there enough of a chemical difference be tween Polaroid's recommendation of Sodium Sulfite and your use of Sodium Carbona te to be causing the problem you are having?
You mentioned that you had been soaking your type 55 negatives in sodium carbona te. I sincerely hope that was not the case, and that you mis spoke in your messa ge.
Sodium carbonate is a fairly strong alkalai as film chemicals go, and could very well have floated the emulsion off your negatives.
Polaroid's recommendation for Type 55 is a 18% solution of sodium SULFITE for Ty pe 55 negatives, and a 12% solution of sodium SULFITE for type 665 negatives.
Sodium CARBONATE is washing soda.
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