SU1724693A1 - Compound for cleaning parchment sheets and binding of manuscripts - Google Patents

Abstract

The essence of the invention: composition contains,%: potassium oleate 50-60; turpentine 10 - 15; benzyl alcohol 10-15; sodium or potassium salt of dichloroisocyanuric acid 0.3 - 0.8; distilled water else. 1 tab. with s

Description

The invention relates to the preservation and restoration of archival and library collections made on parchment (letters, books, historical relics).

To clean the parchment of the documents, various solvents (gasoline, isopropyl alcohol) are used, as well as aqueous solutions of neutral soap with additives of ammonia, soda, etc. Individual solvents do not provide high-quality cleaning, since this does not remove the pigment spots, leaks, and heavy contaminants. Neutral soap paste, widely used for cleaning parchment, also does not remove pigmentation and stain, causing strong. deformation of the processed sheet due to moisture absorption.

Subsequent drying is carried out using a cloth and a press, and text and miniatures may be damaged. These compounds do not give fungicides when stored in funds.

The closest to the proposed one is the composition of PAST-7. The parchment sheet is smeared with a cotton swab, after 2 to 3 hours the preparation is removed with a spatula and a dry gauze swab, and the excess of the preparation is removed with a wet swab.

The use of this composition allows to remove fatty spots, dirt, smudges, but it does not achieve the removal of pigment spots, the whiteness of the parchment slightly increases. Going on

x | GO

Ј

o you

Oj

significant sheet deformation due to moisture absorption. In the course of further processing of the sheet for the purpose of its straightening by the method of remote moistening, a mold lesion is possible, the same lesion is possible when stored in foundations. (The method of remote moistening - a sheet of parchment is lined with dry sheets of filter paper in 2 to 3 layers, then a wet sheet is applied and covered with dry sheets on top, then pressed into cloths).

The purpose of the invention is to increase the fungicidal effect, eliminating the possibility of deformation of the material being processed while simultaneously increasing its whiteness.

The composition for cleaning parchment sheets and bindings of handwritten memorials contains potassium oleate as a detergent, turpentine and benzyl alcohol as solvents, and as a whiteness enhancer,

-aqueous solutions, sodium or potassium salts of dichloroisocyanuric acid (DHCC). The ratio of components in the composition, May. %: potassium oleate 50-60; salt DHTSK 0,3 - 0,8; turpentine 10 - 15, benzyl alcohol 10

-15; distilled water else.

The composition is prepared as follows.

Turpentine is added to the calculated weight of potassium oleate, benzyl alcohol is added with constant stirring, and then the calculated amount of a 3% aqueous solution of DCTC salts and distilled water. The prepared composition is a water-in-oil emulsion and has the appearance of a thick, light-yellow paste.

The composition is applied with a gauze tampon on the contaminated areas of the processed parchment sheet (or on the entire sheet when it is heavily contaminated) or a parchment cover, held for 10-15 minutes and removed with a dry tampon. Then, moistened with water and wrung out with a cotton swab, wipe the surface of the sheet several times until all paste remains are removed. The treated sheet is dried between sheets of filter paper or placed between filter webs without a press. The studies were carried out on samples of parchment of the XIX century (sheets) and XVIII century (covers). Fungicide was assessed by the rate and intensity of self-growth. The cleaning effect was evaluated by the change in whiteness determined on a spherical photometer. The test results of the samples in examples 1-3 are presented in the table (given extreme and optimal examples).

PRI me R 1. Composition, May. %: potassium oleate 55; turpentine 12; benzyl alcohol 12; sodium salt DHTSK 0.5; distilled water 20.5. The paste is applied with a gauze pad on soiled areas of the parchment sheet, allowed to stand 10 minutes and removed with a dry pad. Then the surface moistened with water and wrung out with a cotton swab is wiped several times until the paste is completely removed. The treated sheet is dried between sheets of filter paper.

Examples 2 and 3. Conducted by a similar example method. In Examples 2 and 3, the possible minimum and maximum amounts of DCTC and benzyl alcohol in the composition are given.

The introduction of the composition of aqueous solutions of salts DHTSK with benzyl alcohol provides the following benefits: message to parchment sheets and fungicide bindings; deformation of the parchment sheets is avoided; whiteness of the background increases; the quality of the restoration is improved.

Claims (1)

Claims Composition for cleaning parchment sheets and bindings of handwritten memorials, including potassium oleate, turpentine, organic solvent and distilled water, characterized in that, in order to impart fungicide, exclude the possibility of deformation of the material being processed while increasing its whiteness, the composition additionally contains sodium or potassium salt of dichloroisocyanuric acid, and as an organic solvent is benzyl alcohol in the following ratios of components, wt.%: Potassium Oleate 50 - 60 Turpentine10-15 Benzyl alcohol 10-15 Sodium or potassium dichloroisocyanuric acid salt0.3 - 0.8 Distilled water Else n P and me and whiteness. The whiteness is determined on a spherical photometer. Mushroom resistance (fungicide) is determined by fouling, samples in wet conditions (100% moisture: temperature 28i2 ° C, test duration 1V eut; evaluation of standard results in points; O - no growth when examined under a microscope, 1 - single visual evaluation, 2 - fouling less than 25% of the sample surface).