Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Years back I had a nice exposure box, three 18" desk lamp size T8 15W UV tubes on the bottom half and 3 on the top half. Boxes (upper and lower)were of white painted wood about 20"L x 8"W x 5.5"H. The bottom half had 1/4" glass plate about 4" above the tubes to support the board and artwork. On top of that was another pieced of glass that I could clamp down to compress the art to the board --just four bolts with wing nuts. After clamping down the top glass you set on the the upper box and turned the timer to 3-5 minutes, the timer would ding and the lights would shut off. Worked great. There was no collimation so you had to make sure the emulsion on the artwork was against the board. Don't know how it would have been with a TSOP.