first i want to give out mega-thanks to everyone who posts, it has helped us out a lot. eveyone offers up great ideas, positive feedack and concrete criticism, the forum rocks. we are post-virgins, so this is our first time.
i built an exposure box... and it exploded.
48"x36", 36" deep, three 500w haologen work lamps, 1/4 glass top.
the light source is on bottom of box, roughly 36 inches away from glass.
here is what happened:
oiled up laser copy of art using mineral oil. paper became like vellum, pretty transparent. then we stuck oiled postive to screen and placed on glass. we put a black blanket ovet the entire top then put some yellow page books to ontop of that to hold positive against screen and glass.
we had done some exposure time tests, at 18 min. the image washed out but left a ghost of the oiled paper shape, (not sure if that is normal). during wash out the emulsion started to soften up and breakdown.
the next test was 25 and 30 min. with slightly better results. image washed out fine, took a little bit, but washed all out. we noticed we had less of a ghost shape left by the oiled positive, but the emulsion started to soften up still.
the next time test we where going for 35 min., and BOOM!... no more exposure box.
the 1/4 inch glass shattered and fell onto our lamps. our lamps went bye-bye.
we always expect failure, so we know we can rebuild. any advice on the situation would be great. should lamps be closer? should we use flurecents instead? thicker glass? are we oiling positives wrong?
we'll be chewing on hot oiled shards of glass all day.
i hope our first post was as good for you as it was for us.
thanks in advance.