I know there is a detailed thread describing all kinds of chemicals used in the darkroom and how they may cause health problems, but that is lots of chemical stuff for me. Could someone tell me if the fixer solution (ammonium thiosulfate solution) or the developing solution (D 76 1:1)should not come in touch with hands or which one is more agressive for skin? My tank leaks and after last developing my hands itched a bit. I am going to buy gloves. Oh and I hear some of the chemicals should not be end up in the sink or toilet.