Hi there, I'm new to darkroom printing and I'm having some trouble. I'm printing bnw and using ilford multigrade developer. When I place my paper in the developer tray the image starts to appear after a few seconds however the whole paper then turns completely black and the image disappears after about 20 seconds - does anyone know what the problem might be? I've done test sheets, haven't used filters and my lens is set to 8 f-stop. I've also checked the paper hasn't been damaged by white light. I mixed the developer at 1:9. The developer could have been colder than the suggested 20 degree temp - could this be the problem? I'm not sure what else to try, any advice would be massively appreciated. Thanks!! Laurel