I'm new to carbon printing. Took workshop with Vaughn 10 days ago and am now playing with the tissues I brought home. I'm having trouble separating the film and tissue from the fixed out RC paper. After exposure (with a cardstock matt over glass for unexposed edge), I'm mating them in cold water (50C). Out of the water in 20-30 seconds, squeegee'd, dried with shamwow cloth, pressed under glass. Tonight, after getting 5 under glass, I paused for dinner. After dinner, hot water (110-120C). Soaked for 3 minutes before trying to separate - gelatin was seeping nicely from the edges. The first 3 prints a section of the glop completely separated from the film. After another 5 minutes in the hot water half the image was visible, the other half obscured under thick blackness. Giving it more time and pouring warm water on that section eventually dissolved the excess, and the prints look OK. The last 2 prints the glop stuck to the film, and a portion of the image stayed there, leaving a blank, white patch on the paper. Not salvagable, obviously. I brush sensitized between 1 and 2 PM. Developed film for an hour and a bit while they were drying. Exposures, squeegeeing, and pressing were all done before 5. Dinner break, back to work before 6. Processed in same order as went under the glass (so all were under glass for at least 30 minutes.) Done around 7:30. One thing I'm not doing as taught - I'm not using 16x20 glass to press my 4x5's. I just don't have the counter space beside the 16x20 sheet I'm squeegeeing on. I'm using 8x10 glass with a weight on top - a full 2 liter bottle. Could that be the problem? Too much weight? Not enough? Any insight gratefully appreciated.