Why impossible film can’t stand light
Since I learned about the revival of polaroid instant film by The impossible project, I’ve wondered why you need to shield a impossible film from light. I mean I’m still quite young and what I remember from Polaroid was that you could see it develop. Now about a week ago, the impossible project had dr. Love explain it all over at their blog. I’ll try to give you a simple recap here.
So most of us will know that a developed Polaroid type image is a negative with chemicals applied so that it leaves an imprint on the positive paper. Now the film constist of a couple layers and because you can’t have an image without a reaction to light, there is a light sensitive layer. Polaroid films had an opacification layer, upon spreading the chemicals, there was a component that reacted with the layer, so that it kinda acts as a blind on your window. It immediatly blocks out most light to the film.
Apparently this layer contained Titanium Oxide, which happens to be really rare and expensive. It also wasn’t perfect, that’s why Polaroid included the frog tongs on their cameras, to protect the ejected film from light in those very first instances.
The Impossible project is working on a new solution to this problem, but it takes a lot of time and testing to get it right. Keep in mind that it took Polaroid 17 years to perfect their film and The Impossible project is only working on it for a couple of years. I think it is already great that they have some very usable film out there in that short of a time without having the recepices from Polaroid.
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