전통안료 석간주 원료로써 울릉도 석포리 적색 퇴적층의 자연과학적 연구

Abstract

This study investigated the formation patterns and mineralogical properties of the Seokpo-ri sedimentary layer, which is a potential pigment raw material in Ulleungdo Island, which is reported as the main provenance of the red color in traditional pigments. Seokpo-Trachyte at the research site consists of a thick lava flow over 5 meters and an exposed volcanic sedimentary layer about 2 meters thick. Pyroclastic deposit is composed of volcanic tuff in the lower part and tuff in the upper part, and the tendency of upward granulation is evident, indicating that the Pyroclastic deposit developed in the lower part of Seokpo-Trachyte was formed by descent. Among the layers, US-9 was yellowish brown, and the redness of the sample fired at 800℃ increased, but the saturation was low for use as a red pigment. Seokpo-ri sedimentary layer corresponds to sandy loam from silt loam, and the redness tended to increase as the sand content increased. The main constituent minerals were sanidine, anordoclay, mica, halloysite, and ferrihydrite. Through TEM analysis, a globular halloysite with a concentric circular structure was identified. Ferrihydrite contained in brown soil after calcination becomes a hematite phase transition and turns reddish brown. Therefore, it is believed that it can be used as a red pigment that does not require a high degree of redness through the separation of paticles and firing processes.