cheapo option up to 8x10
for smaller sized dry mount runs I use the release paper that avery labels come attached to. I always have a supply of them saved up and sitting in the same old paper box that I store the dry mount tissue in.
When I do postcard exchange runs printed on fibre baed paper, I put release paper on the print side, against the face of the print, and also on the piece of backing card stock that I have photocopied my pertinent text onto.
I am using up a supply of Ademco dry mount paper, that if I interpret the date code correctly is from 1951. It needs about 325F to bond, and at this temp, the carbon in the photocopies text starts to melt. Without the back side release paper, the phot copy black wants to stick to the backing matted board that I use to shim the otherwise skinny mount package with.
I save the proper release paper for larger sized prints, since it is not cheap, and I want to strecth the mileage left on what I have before I bite the bullet and re-order.