When a thin ethylmetaacylate plate which has been heated to around 100°C is hot-pressed, 2_??_3kg/cm2 pressure, on woven material (treated with either ethyl alcohol/formalin mixture or osmic acid solution), the plate picks up lousiness found in fabrics as is and adheres to the plate.The surface of the plate was vapor-coated with carbon and then shadowed with chrome. This plastic was disolved with acetone and lousiness test piece made.Electron microscopic study of the test piece was made with follwing results;1) Lousiness consisted of fibrils (round and flat, ribbon-type long fibrils) of diameters around 500A, 0.2_??_0.4μ, 0.6_??_0.8μ, 1.0_??_1.2μ, 2_??_5μ and those composed with Brin. In general it is evident that out of these fibrils, those of diameters from 500A to 1.2μ and Brin are predominant.2) Lousiness in silk fabrics is studied from the point of the flocking of fibrils, grouping density and foreign matters which inter-mix, not belonging to the proteid group. The lousiness (interm-ingled fibrils of 500A to 5μ diameter) is formed in the types A and B, sub-divided into type AI, AII, BI and BII, Type AI has large nucleus and thick grouping density in the fibrils and Type AII, small nucleus and thin grouping density, Type B is scattered in larger, area and has no nucleus, Type BI and BII have thick and thin grouning density of fibril respectivelly.Lousiness of Type C is made up of foreign matters belonging to the non protain materials and those of fibrils, while those which containes Brin is Type D.Large type lousiness on silk fabrics was found besides the above six types. This lousiness is composed of fibrils of 500A to 5μ diameter and is made up of combinations of the six types(AI, AII, BI, BII, C and D) such as AI-AII, AI-AII-BII, AI-BI-BII, AI-BI-C, BI-C-D, AI-AII-BII-C, AI-AII-BI-C-D, etc.Large type lousiness is classified as Type E.
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Oct 1, 1961
Kimio Hashimoto 
Open Access