To handle color print paper, does it have to 100% light tight? My darkroom is in the basement with 4 small windows (about 1'x2' size). I only work at night. I can seal the window that closes to my work area, even the other two. The last window is far away. I mainly just take out color paper from bag and put it down at the enlarger. I can put the color paper in change bag. I did not have any problem with B&W printing.