Niccolo Caldararo & Candis Griggs: "Preliminary Report on the Conservation of Slides with Special Reference to the Removal of Mold"
http://palimpsest.stanford.edu/byorg/abbey...5/an26-512.html ZITATSuccessful removal [of mold/fungi] usually required the following procedure. The slides were placed on a plastic base in a refrigerator freezer at or below freezing temperature. The slides were removed when a film of moisture could be seen to have accumulated on the surface. They were then swabbed with a Q-tip, removing all the moisture and fungal colonies with one tip, and then quickly buffing the entire surface with the other (see before and after illustrations in Figs. 4a and 4b). Sometimes this had to be repeated two or three times. If the first removal was not done carefully, some chitin would be deposited along the edges of the slide against the frame, and could be seen as a margin in raking light. The initial cleaning is often so remarkable a change that the operator often believes the surface has been completely cleaned. Careful examination under raking light will often detect streaking, which is a film of incompletely removed chitin, in our opinion. Second or third attempts often remove this film adequately.[/quote] ZITATWe also find that removal of fungi by freezing is less effective [under some] conditions, but that the residue can sometimes be cleaned off with a solution of mineral spirits and water 1:1, or of mineral spirits and water and 1% NaOH, or a solution of 1 unit of chitinase. As an alternative, the Kodak method can be used: a solution of 1/2 oz. (15ml) of household ammonia to 8 oz (240ml) of denatured alcohol. Since most "household ammonia" contains detergends which Eaton specifically recommends avoiding, one must use reagent ammonia and adjust the concentration. James Rice (a textile conservator) published a series of articles in the Textile Museum Journal in the 60s and 70s. In one (no. 14) he notes that he found most household ammonia to be 15% concentration. To achieve this concentration from reagent grades of 28%, one must dilute the reagent at specific gravity of 0.90. All of the above secondary methods are best applied using a swab, by rubbing on and then rubbing off under a hair dryer. The Kodak method seems to air dry well, but can fog at times. All of these can be applied with a swab, rubbed on and then rubbed off under a hair dryer.[/quote]
"All the important human advances that we know of since historical times began have been due to individuals of whom the majority faced virulent public opposition." --Bertrand Russell
#1 von
matthiaspaul
, 01.10.2007 01:33
