The backlog for mounting is of c. 11.000 specimens. The problem is now being addressed with a new member of staff.
Procedures for both mounting and conservation follow a number of the practices developed by the herbarium of the Royal Botanic Garden Edinburgh (E).
Materials. Acid free paper and glue for type specimens, pre-1840 specimens and specimens of important collectors; other specimens are still mounted on existing paper. One sided adhesive brown paper tape (Gumstrip Sealing tape). Coats Aptan thread in brown and sewing needles. Plastic paper clips.
Methods. The specimens are fully glued or almost so to the paper and a substantial amount of plant material is included in a capsule. The specimens are further fixed with strips of adhesive paper and when necessary sewed to the support.
The cryptogams are included in envelopes that are mounted on smaller herbarium sheets (32.5 x 23 cm). Algae are mounted on paper of normal size.
Materials. For cleaning are used very large white goat hair brushes, Dry Cleaning sponges and shoe rubber. Rice paper is used for paper repairs. Acid free glue; acid free paper is at the moment used only for the special specimens.
Methods. Specimens are conserved for either preventive (to protect only) or remedial (the specimen is altered) reasons. Remedial treatments are carried out to a minimum, enough only to give stability and durability to the specimens. The most common problems are loose material, surface dirt, rusty metal clips, insect damage and support bending due to heavy/bulky specimens.
Remedial treatments on type specimens, pre-1840 specimens and specimens of important collectors are carried out with special care. When a major intervention is essential, that is documented on the specimen.
1. Black pen, waterproof, lightfast
2. Goat brush for delicate cleaning
3. Adhesive tape in a roll
4. Adhesive tape finely cut
5. Sponge soaked in water
6. Narrow brush for gluing
7. Large brush, pointed for cleaning
8. Dissecting needles
9. Fine point tweezer
10. Fine point scissors
11. Fine point secateurs
12. Glue, acrylic
13. Industrial thread
16. Water to dilute the glue
18. Ink pad for stamp
19. Cleaning cloth