巨大サイズの土壌薄片の作製法について

概要

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The impregnation method using unsaturated polyester resin was employed for preparing large thin section of soil. The procedure for the impregnation was as follows: 1. Samples were dried at room temperature and 40℃ maximum. 2. Samples were kept in a steel chamber which was connected with a glass vacuum sphere filled with a mixture of the polyester resin, the dilute (0-100%), the catalyst (0.2-0.4%), and the accelerator (0.1-0.2%). 3. The steel chamber was kept under the vacuum condition for 1-10hr, according to the density of soil, until the mixture impregnated into the samples. 4. After impregnation of the mixture, the steel chamber was filled with high pressure nitrogen gas provided from a nitrogen gas cylinder. 5. The hardened samples were sawn with a diamond saw. 6. Saw off section was ground with a surface grinding machine. 7. The section was mounted onto a slide glass, the polished side of the section being faced to the slide glass. 8. Mounted section was sawn with a diamond saw 1.0-0.5mm in thickness. 9. The thickness of mounted section was reduced to 30-40μm with a surface grinding machine. 10. A cover glass was put on the polished thin section.
国立科学博物館の論文