Bruce Watson
Surprised no one has mentioned it .... why not just shoot a Polaroid in the first place and keep it as a record of the exposure. If what you are really seeking is an instant solution that will give you a final print ..... it doesn't exist.
Try to look at emulsion side of contrasty negatives at varying angles and light direction until you find the combination of angle & light that convinces you that you "see" what a print would be. It is subjective: sometimes looking through the film (emulsion on other side) will do it for you, your perception. This is an area where 35mm. and 120 film users have it easier because the curve in the film when you hold it up does things to the light coming through the negative. For me, old TRI X developed in Rodinal 1/50 or so produced a negative that I thought could appear to tell me what print would look like. It is subjective.
Bernie
There isn't one.
What they are experiencing is the same effect that makes a wet-plate collodion ambrotype or tintype work as a positive.
To work with a "film" negative it needs to be a bit underexposed and a bit overdeveloped. I stated that from memory so I may have said it backwards. At any rate, a "proper" negative won't easily exhibit the effect.
And by the way, you mentioned the anti-halation layer. With proper washing and fixing, that is long gone. You may have some residual base tint (blue, gray or pink) but that isn't the anti-halation layer.
The best thing you can do is to test your film and developer for proper EI and developing time. Simple, no densitometer needed, test in the free articles at View Camera. Then print lots and lots of negatives. It will become easier to read a negative with practice.
Were you thinking of contact printing with the glow in the dark paper to get a temporary image? It might work, but you would still have a negative image. The bright glowing areas would be the clear (shadow) areas of your original negative.
Looking at a negative against a dark background does work somewhat, but best with a very thin negative and with a light shining just the right angle on the silver of the negative. It's actually kind of magical. But probably not useful for your needs. I discovered this by accident many years ago when I had some very thin negs from some early street work. Cool to hear that someone else has discovered the same thing!
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