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. |
Category Archives: — Conservation Tips
Conservation Tip No 8: Removing chewing gum from paper documents
Can you give info on removing chewing gum on reverse side of an important document? There is a small quantity of gum still in place – fairly fresh, a circle of about 1/2 inch. Some stain has bled thru to front.
Conservation Tip No 7: Upright support for books in storage
The U-Splint book support (Splint) is a simple alternative being trialled at State Records to help minimize further damage and support the book structure without the need for costly treatment.
Conservation Tip No. 6: Dealing with wet records
Before going into any detail about the salvage and handling of wet records the importance of relevant training cannot be stressed enough.
Conservation Tip No 5: Removing mould from records and archives
Removing mould can be difficult, dirty and time consuming. Mould remediation should not be undertaken lightly – especially where large quantities of records are affected.
Conservation Tip No. 4: A Method of Rehousing Glass Plate Negatives
Glass plate negatives are extremely fragile and need to be handled very carefully. The glass is old and brittle and plates may have been cracked or broken and will sustain further damage if not treated with care.
Conservation Tip No. 3: Removing blood from paper documents
If you find yourself bleeding all over your precious documents or family heirlooms, do not despair, speedy action will probably result in little or no permanent damage occurring.
Conservation Tip No. 2: Storing large documents, maps and plans
If you have large documents like plans, maps and posters the best way to store them is …..
Conservation Tip No. 1: Sticky Tape Removal
This is the first of a planned series of posts providing handy conservation tips.