Learned the hard way last night. Left two prints in my intermediary water bath (straight out of the fix) for a couple hours ... one print was on Arista EDU RC and the other was Varycon 8x10 fiber. Emulsion on the RC literally sloughed off when I went to grab the print with my tongs. The Fiber print had only softened emulsion, which was merely marred by the tongs ... it didn't slide off the page the same way. I've never seen this before. Fortunately, neither print was terribly important. But it still felt akin to a kick in the pants.