Types |
Rubber based adhesive/sellophane carrier. |
Acrylic based adhesive/ plastic carrier
|
Physical
|
 |
 |
| Looks yellow. | Looks white. | |
Adhesive |
There are many different adhesive recipes. They age differently and are soluble in different solvent mixes. |
Adhesive does not degrade as much. Solvents are generally not required to remove residue. |
Degradation |
Adhesive oxidises with time, in several stages:-Goes gooey
-Oozes from under the carrier, so it gets dark, sticky edges -Darkens and seeps into paper -Oxidisescompletely and looses stickiness, carrier peels off. |
Adhesive doesn’t degrade as much. Does not change collour.It:-Goes slightly gooey.-Seeps from under carrier slightly, so it gets sticky edges. |
Damage to paper/card
|
-Severe yellow staining -Brittleness |
-Slight staining-Can cause inks to become feathery, especially non-water soluble ones (red, blue biro) |
Removal |
Different techniques appropriate for different stages of degradation.Gooey/Ooze stages:-Apply heat (hairdryer)-Remove carrier by sliding a blade between it and the paper-Remove adhesive residue using a crepe square. If there is a lot of very gooey adhesive, balling it up using a scalpel blade can work. Dark/oxidised stage: -Peel carrier off with hand or scalpel -Scrape off adhesive residue -Staining can be decreased removing some of the residue using solvents or mixes of solvents, many of which require a license to purchase. |
-Apply heat (hairdryer)-Remove carrier by sliding a blade between it and the paper-Remove adhesive residue using a crepe square. If there is a lot of very gooey adhesive, balling it up using scalpel blade can work.-Leftover adhesive residue can sometimes be removed swabbing with solvents or mixes of solvents, many of which require a license to purchase. |
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