Homemade stock pages?
There are a lot of creative ways for collectors to organize their collections and hoards. Here is one I have not seen before in fifty years in the hobby. Someone made pages full of stamp-sized pockets using staples. While this can hold a fair number of stamps, you can't see the stamps, and it doesn't scale well. What happens when just a few of the pockets start to overflow? The big issue is that those staples are going start rusting... and that rust will leach into the paper around it, ultimately causing little brown stains on the perfs of the stamps. I have seen that small brown stains on perfs many times, but figure it's more likely caused by tape used to seal plastic mounts. I have heard arguments that these kinds of stains can spread by contact to other paper items. I don't know for sure. These are cheap stamps and and I will be getting them off of these pages when I get the chance.