The Development of a Ready-For-Use Poultice For Local Removal of Starch Paste by Enzymatic Action
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English Slovak |
| ISSN: | ISSN 0034-5806 |
| Online Access: | http://www.viks.sk/chk/res_3_4_99_225_244.doc |
| Abstract: | SUMMARIES. An enzyme poultice for local removing brittle and hardened starch locally with a minimum of moisture has been developed. The recipe for the gel containing enzyme and the way of application aims at reproducible results to be obtained in a short time. The enzyme poultice is available ready for use and can be activated by adding water. It enables the dismounting of large batches of mounted sheets without further treatment. It is essential to use the poultice in the way described together with an interleaf paper. Contamination of originals due to the treatment can be minimized in this way. CONCLUSION. The ready for use amylase poultice has proved to work successfully, i.e. to remove hardened starch paste and backings with a minimum of moisture, in different collections, for different objects, including large formats. Its main advantage is that it remains usable for at least a year, that it can be used without further equipment in any workshop and that its application can be controlled. In contrast to the older technique, i.e. putting the gel-containing enzyme onto an interleaf paper positioned on the object, very little residues remain in the objects. From the analytical results reported above it can be concluded mat washing the objects after treatment may be advisable, but not indispensable. Of high importance for the application of the enzyme poultice is the use of interleaf paper in order to prevent the migration of the gel from the poultice to the original. Of further importance is the removal of the softened of liquefied residues of the adhesive combined with a local cleaning procedure of the treatment area. Denatu-ration of enzyme residues within the original item by means of hot water, alcohol or other techniques is not necessary due to their negligible amounts19. Application of the amylase poultice is recommendable in all cases where embrittled starch paste adhesives cause severe problems during the separation of original mountings. In addition, the method is advantageous for the detachments of very soft papers because of the liquification of the paste which allows gentle detachment without fibre losses. The low manpower necessary for the application of the technique allows economic treatment of large amounts of items. A further advantage is the fact that no after treatment such as washing and flattening is necessary. The ready-for-use enzyme poultice is patented and is obtainable by suppliers of conservation materials. |
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| ISSN: | ISSN 0034-5806 |
