After scanning (some of) them I would like to destroy the old 35mm slides I inherited due to privacy concerns. I will separate them from the frames, so I'm talking about destroying only the thin film slices. They are from a wide range of time spanning from the early 1970s until today.
No, I do not want to keep them as a backup just in case the scanning process later turns out to be suboptimal or I lose my HD's (which is the typical answer I found on the Internet ;-).
I thought about
But that could be very toxic, or isn't it? I'm talking about several thousand slides. What would happen if I put those in a campfire or similar?
heating them in an oven
But again this could produce toxic gases, or won't it? And anyway, would it even work? What temperature would be needed? I'm reluctant to simply try it out because of the fear of creating toxins in my oven.
putting them in some chemical
Is some household chemistry capable of destroying them to the point where the pictures aren't visible anymore?
cutting them into thin stripes
But a normal shredder for paper actually creates stripes so wide that each is like a complete picture itself, so that doesn't really count as a way of destroying them. I would need to have a very fine cutter and it's not important enough to specially buy such a thing, unless it's very cheap.
Any ideas or other proposals? Maybe someone has already done this without hiring specialists for the job (which really would be overkill in my case)?