Originally posted by MerpsMom:
I am currently mounting 213 pix. Some are RC, some laser, some thermal, some inkjet, on and on. Ruined one digital reprint which I can get again myself, almost ruined one supposedly RC...You simply cannot tell on some of these things.
You have it right about digitals.
If you have a statement that specifies the paper, ink set, and printing machinery used to produce that image, then you can go to
www.wilhelm-research.com or the manufacturers' sites, and check permanence of the combination.
Otherwise, you have no way to know whether the image is heat sensitive -- unless you are willing to apply heat from your tackng iron in a small spot on the edge (not recommended, because it may be damaging). And even if the spot-heating does no harm, the heat of dry mounting could damage the inks or paper in ways that won't show up until years later.
Digitals present a dilemma because they may be sensitive to heat, moisture, and chemical reactions -- any or all permanent mounting methods may be destructive. There may be no way to tell by looking at the print.
The best mounting method for digitals is a non-invasive method. Edge mounts or hinges, for example.
But if I had to choose a permanent mounting method, for digital prints, it would be 3M ProSpray. No heat, no toxic chemicals, controlled pressure (use a brayer), and controlled moisture (spray the substrate).