The production of a clear alcoholic solution of shellac has been the subject of numerous experiments, but hitherto none has turned out satisfactory except ...
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https://www.riss.kr/link?id=O134696977
1876년
eng
학술저널
PHP / Trade Journals / Feature
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
The production of a clear alcoholic solution of shellac has been the subject of numerous experiments, but hitherto none has turned out satisfactory except ...
The production of a clear alcoholic solution of shellac has been the subject of numerous experiments, but hitherto none has turned out satisfactory except slow filtration. As is known, by digestion of one part of shellac with six or seven parts of 70 per cent, alcohol, a solution is obtained which when warm is almost clear, but upon cooling becomes turbid, and is only partially clear after standing a week. The plan of pouring sufficient alcohol over coarsely powdered shellac to form a thin paste, yields upon the addition of more alcohol after the lapse of eight or...
CASTILE SOAP AND ITS COUNTERFEITS