Polaroid "Print Coater" substitute (aka "Caustic Jelly")

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Some Dude - 07 May 2005 15:33 GMT

I'm shooting a little with my Polaroid Land Camera Automatic 100 (type
47 film I believe) and am wondering what is inside these "Polaroid
Print Coater" tubes. It must be a fixer of some sort but the tubes are
35 years old so the "brush" is dried out. I am thinking a quick dunk
into some regular hypo should do it. It smells faintly acidic more
like stop than hypo, though.

Any thoughts?

Thanks,
sd

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Nicholas O. Lindan - 07 May 2005 21:32 GMT

> I'm shooting a little with my Polaroid Land Camera Automatic 100 (type
> 47 film I believe) and am wondering what is inside these "Polaroid
> Print Coater" tubes. It must be a fixer of some sort ...

I think it is just solvent with a plastic dissolved in it. It dries
very fast and puts a protective coating on the print. If it had fixer
[i.e., the print needed fixing] then the print would turn black with
time, instead uncoated polaroids fade. Polaroid negatives are dipped,
in sodium sulfite to stabilize them.

I am sure there is a patent [knowing Polaroid, more like 10 patents]
that describe just what goes on with print coating.

http://www.uspto.gov/main/patents.htm click upper right - 'search patents'

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Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
To reply, remove spaces: n o lindan at ix . netcom . com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

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Some Dude - 13 May 2005 17:33 GMT

Thanks.

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