I have been trying to expose screens. Emulsion I use is AF-101, Diazo type emulsion. I coat both sides of the screen one time and let it dry for whole day. I use one 15W fluorescent light and tried exposing the screen from 8 min. to 20 min. (have changed the exposure time by one min. from 8 to 20). Right after the exposure, I use the shower (not industrial, just a regular shower in a bathroom) to wash the emulsion off. After about 30 seconds, the emulsion starts to come off but the water washes off everything. I have been using the same exposure method with the same 15w fluorescent light last couple of times and it has been successful. However, I can't get it expose right this time somehow. The emulsion is brand new. I tried it again and again, but have no idea what I should do. Any suggestion or tips will help me! Thanks you!