What happened to Pinakryptol?

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Nicholas O. Lindan - 17 Feb 2004 15:37 GMT

Pinakryptol dye was/is a desensitizing agent that allowed
film to be inspection developed under an OA(?) safelight.

I know it comes in green, yellow and white - with the yellow
and white preferred these days.

Does anybody use it for developing sheet film by inspection?

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Nicholas O. Lindan, Cleveland, Ohio nolindan@ix.netcom.com
Consulting Engineer: Electronics; Informatics; Photonics.

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Paul W. Ross - 17 Feb 2004 21:02 GMT

I would love to find some. I do 4x5's from my pinhole camera by
inspection. I have the dark green safelight, and take a quick peek
about 2/3 of the time through the standard time/temperature value.
Works fine. At those low light levels, it is very hard for me to judge
contrast/level of development, but I have had good results.

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d23 - 17 Feb 2004 21:22 GMT

I bought some from Photographer's Formulary not too long ago.
Charles Portland Or

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Ian Grant - 21 Feb 2004 23:37 GMT

I have quite a lot :-) really !

but then it's economics and depends where in the world you are.

I bought the entire stocks of Photochemicals from a UK chemical supplier a
few years ago - for next to nothing. They were bought up and ceased trading
the following year.

So loads od Pinacryptol Yellow, dilute and highly concentrated / powder.

So if your in Europe no problem, it would be cheap.

Ian

> I would love to find some. I do 4x5's from my pinhole camera by
> inspection. I have the dark green safelight, and take a quick peek
> about 2/3 of the time through the standard time/temperature value.
> Works fine. At those low light levels, it is very hard for me to judge
> contrast/level of development, but I have had good results.

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