I am now contact printing my 5x7 and 8x10 negs on double-weight fiber based pape rs and am looking ahead to the mounting process. The plan is to trim the prints , dry mount, and overmat with a narrow strip of the board exposed. My questions : (1) My catalog offers buffered boards/mats in two materials, cotton fiber and purified wood pulp. Any comments on the relative merits of these materials? (2 ) The curling of the fb papers has me wondering how I'll be able to tack on the mounting tissue and precisely trim print-and-tissue on my Rotatrim *prior* to dr ymounting. I understand that the press (which I do not yet own) will flatten th e print, but how can I get the print into workable shape before reaching that po int? Any suggestions that don't involve expensive, specialized equipment? Than ks in advance for replies.