I've used rolls of both the ilfospeed digital RC and fiberbased under an enlarger with excellent results. The speed is about the same as MG IV. You need to work in pitch darkness - no safelight. Contrast is approx. grade 3-1/2 to 4. 52"x 98' rolls of this stuff seem to be the best kept secret on Ebay with prices as low as $50! I bought three rolls at that price. The seller had another 82 rolls. At the time I purchased, the seller's stock had been up on the auction site for several weeks. I was the first person to buy. Kind of nuts considering the retail price of $800. If anyone wants some cut down to smaller sheets to experiment with, PM me.