Just graduated from art school and lucked into a very nice darkroom that hasn't been used in probably thirty years. My goal is to get it up and running, and so far two big questions have come to mind. Firstly, is there a safe way to dispose of old chemistry? There are quite a few half full bottles of mystery liquids, and I know my predecessor printed colour, so these are likely pretty toxic. Secondly, is there a good method to flatten fibre prints? Would ironing work, or could I just leave them under a couple of encyclopaedias for a while? I don't wish to mount them, just flatten. Thanks.