Hi Folks,
This is my first post to the APUG forums. Here's Seal's recommendation for drymounting photographs, from their book _Mounting, Laminating, and Texturing: The Illustrated source on methods, techniques and applications_, 1990.
1. Pre-dry fiber-based photograph face down on clean kraft paper. Pre-dry substrate.
2. If exact positioning of photo on the substrate is necessary, tack photo in position. [Directions will given later.]
3. Place materials in dry mount press at 200F for approximately 1 minute. The assembly of materials should be, from top to bottom: Release Paper, Fiber-based photo, ColorMount, Substrate, Release paper.
4. Remove assembly from press and allow to cool under a weight.
Regarding pre-drying, they say:
"With the press at normal operating temperature, place the mounting adhesive on the back of the print to be mounted. This may be tacked through Release Paper.Trim adhesive (if necessary) to print size. Place the print face down on kraft paper and cover it with Release Paper. Insert the assembled work in the press for 30 seconds to one minute. As the work pre-dries, the adhesive will bond to the back of the print. Upon removal from the press, allow this assembly to cool under a Seal weight. Remove the Release Paper and trim excess adhesive and any kraft paper which has bonded to excess adhesive, if necessary (this second trimming is sometimes required even when the adhesive had been trimmed to the exact print size earlier).
This procedure helps assure that the adhesive is properly bonded to the print before mounting it to the substrate. When the adhesive is completely bonded to the print in this manner, it is much easier to trim."
Regarding tacking:
"To tack, simply warm the tacking iron to the medium heat setting. Align the print, adhesive and mount board, and place a small sheet of Release Paper along one edge of the print. Place the flat base of the iron over the release paper and apply gentle pressure. Hold the iron in that spot for about five seconds. The print should be satisfactorily tacked. There is no need to tack the entire edge, or center of the print. One spot works best.... Do not tack opposite edges or corners! Do not make and "X" mark in the center!"
-Peter De Smidt