Manufacturing of Oiled Korean Traditional Paper with Plant Oils and Its Deterioration Characteristics ( I ) : Properties of Plant Oils for Oiled Korean Traditional Paper

Abstract

Oiled Korean traditional paper was mainly used in portraits, books, and household goods. However, there is a lack of research on manufacturing methods and techniques for oiled paper products. This study was carried out to investigate the properties of plant seed oils for oiled Korean traditional paper. Sesame seeds (Sesamum indicum L.), perilla seeds (Perilla frutescens var. japonica Hara), and tung nut (Aleurites fordii Hemsley ) were used for oil expression. Yield, viscosity, acid value, peroxide value, and fatty acid composition of sample oils were analyzed, respectively. The oil yields were over 30% and the perilla was the highest. The viscosity of oil was 41.3 cP for perilla seeds, 64.0 cP for sesame seeds, and 248.8 cP for tung nut at 20℃. As the heating temperature increased, the viscosity of oils decreased and the viscosity of tung oil decreased rapidly. Appropriate temperature of oil suitable for oiled Korean traditional paper was determined to be 60℃ in the sesame oil and the perilla oils and 70℃ in the tung oil. Acid value was highest in the sesame oil, but peroxide value was highest in the tung oil. The optimum temperature of oil for oiled Korean traditional paper did not affect the acid value and the peroxide value change. Linoleic acid and linolenic acid were the main components of the sesame oil and the perilla oils and the palmitoleic acid and stearic acid were the main components of the tung oil.