I used the stuff in the 70's. We had a machine that had two sets of reels and a UV light source. The 70mm B&W portrait negatives would enter the machine and be brought into contact with the negs over a drum and be contact printed on the studio proof paper by the UV light. Exposure was determined by the speed. A 100 foot roll took about an hour and then it would be cut into sets for individual subjects and put into a light tight envelope which warned the client not to open in bright light. The image was reddish and would fade very quickly in the sun or bright fluorescent lighting. The ultimate proof . . . the client had to buy finished prints as the proof would fade away.
It also came in 8x10 sheets and I tried it with Large format negatives. Some of which I fixed and still have. The image is still of similar tone and it does not have a great dmax.