I recently got into possesion of an envelope of Eastman Kodak flash sheets as part of a camera outfit. These flash sheets appear to be a primitive form of "lighting".
The envelope describes it as "a powerful actinic light for flash photography". The warnings sound a bit discouraging in terms of safety: "...always stand at arms length...use a match held in a split stick at least two feet long...highly flammable...avoid premature ignition..."
Now for the big question: how should I store this stuff, as I don't want to inadvertently "light" my house with it (but I do want to keep them for historical matters).