TH27356Y - A method for preparing a ready-to-use primer layer from hemicellulose glue derived from tamarind seed pulp for use in the conservation of Thai paintings. - Google Patents

Abstract

OCR 10KL (January 27, 2026) This document describes a method for preparing a ready-to-use primer layer from hemicellulose glue derived from tamarind seed kernels for use in the conservation of Thai paintings. The process begins by shelling the tamarind seeds and blending the kernels. This mixture is then dissolved in distilled water and heated, allowed to settle, and filtered to obtain the clear solution. Ethanol is added to yield hemicellulose fibers. The hemicellulose is then dried in an oven. Finally, it is dissolved in distilled water, and preservatives consisting of (ethylenedioxy)dimethanol, 5-chloro-2-methyl-4-isothiazolin-3-one, and 2-methyl-4-isothiazolin-3-one are added. (2-methyl-4-isothiazolin-3-one) yields hemicellulose glue, which is then mixed with kaolin clay and used as a primer for wood materials. It provides good adhesion, has a long shelf life, is easy to use, and helps solve the problem of tamarind seed shortages during the off-season, as well as problems with fungi and insects. This is used to prepare a primer layer for the conservation of Thai paintings, resulting in a creamy white color that does not crack or peel and adheres well to the material.

Claims (3)

OCR 10KL (29/01/2569) 1. The process for preparing a ready-to-use primer layer from hemicellulose glue derived from tamarind seed kernels for use in the conservation of Thai paintings involves the following steps: a. Shell the tamarind seeds. b. Grind the tamarind seed kernels finely using a blender. c. Dry the tamarind seed powder in an oven at 70-90 degrees Celsius for 12-24 hours. d. Dissolve 0.5-5.0 grams of the tamarind seed powder in 100 milliliters of distilled water using a heating plate, controlling the distilled water temperature to 50-90 degrees Celsius for 15-45 minutes. e. Let it stand at room temperature for 5-10 hours. f. Filter out only the clear solution. g. Add 95% by volume ethanol. The ratio of the volume of the clear solution to the volume of ethanol... Concentrations of 1.0:1.0, 1.5:1, and 2.0:1 yielded white fibrous hemicellulose precipitates. The hemicellulose fibers were then dried in an oven at 60-100°C for 12-24 hours. 1.0-3.0 grams of hemicellulose were dissolved in 100 ml of distilled water using a heating plate. Finally, a preservative consisting of (ethylenedioxy)dimethanol, 5-chloro-2-methyl-4-isothiazolin-3-one, and 2-methyl-4-isothiazolin-3-one was added to the hemicellulose from step N. (2-methyl-4-isothiazolin-3-one) at a concentration of 0.1-3.0 percent by weight/volume, 1 ml. Stir with an electromagnetic stirrer while maintaining the temperature in the range of 60-100 degrees Celsius for 10-60 minutes. Mix the resulting hemicellulose glue with chalk at volume ratios of 1.0:1.0, 1.5:1, 2.0:1, 2.5:1, 3.0:1, and 3.5:1. Then grind and stir thoroughly with a mortar and pestle to obtain a ready-to-use primer layer. Apply this primer layer to the wood material. 2. A method for preparing a ready-to-use primer layer from hemicellulose glue derived from tamarind seed pulp, for use in the conservation of Thai paintings, according to claim 1, where the optimal volumetric ratio between hemicellulose glue and kaolin clay is: 3.0:1