When is Film Light Safe?

Petraio Prime said:

Panchromatic film? Never.

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you might find this article useful..

http://www.michaelandpaula.com/mp/devinsp.html

analog65 said:

I wanted to make sure I am thinking correctly before I develop some sheet films.

It is my understanding that film is relatively not sensitive to light after the development stage.

I ask this question because I am going to be developing some Ilford HP5 B&W sheet film in trays and I wanted to check the negative with a safelight for a few seconds before I put them in my stop bath and fixer.

Can I leave on my safe light on during the stop bath and fixer stages, or do I need to turn it off?

Thanks!

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I would not risk it until after fixing

Panchromatic film can be developed by inspection if you are careful. Exposure = intensity X time and so if you use a dark green safe light with a low wattage bulb at a reasonable distance with short exposure times with this light on (look how the factors are adding up to complicate the issue) it is possible. Plus the fact previously mentioned in this thread, allow at least 20 minutes for your eyes to adjust to this very dim level of illumination before uncovering the film in the development process for perhaps one or two seconds to make that judgement.