 | 1874 - 1182 pages
...processes, that of making the salt and of bleaching the resin, might be advantageously combined. " Dissolve in an iron kettle one part of pearlash in...about eight parts of water ; add one part of seed or shell lac, and heat the whole to ebullition ; when the lac is dissolved, cool the solution, and impregnate... | |
 | 1886 - 408 pages
...has made the arts a valuable present of the following method of producing it perfectly colourless : Dissolve, in an iron kettle, one part of pearlash in about eight parts of water ; add one part of shell-lac, and heat the whole to ebullition. When the lac is dissolved, cool the solution, and impregnate... | |
 | 1865 - 786 pages
...of Arts, the editor of the ' Franklin Journal ' (Philadelphia) made known the process of l)r. llaro, in which he stated that "all the objects sought for...water, add one part of seed or shellac, and heat the whole4o ebullition. When the lac is dissolved, cool the solution, and impregnate it with chlorine till... | |
 | Franklin Institute (Philadelphia, Pa.) - 1864 - 526 pages
...When the processes of Luning and Field came before the Society of Arts, the Editor of the Franklin Journal* (Philadelphia) made known the process of...process : — Dissolve in an iron kettle one part of pearl ash in about eight parts of water, add one part of seed or shellac, and heat the whole to ebullition.... | |
 | Luke Hebert - 1828 - 392 pages
...pro-cesses, that of making the salt, and of bleaching the resin, might be very advantageously combined. Dissolve, in an iron kettle, one part of pearlash...about eight parts of water; add one part of seed or shell lac, and heat the whole to ebullition. When the lac is dissolved, cool the solution, and im-pregnate... | |
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... and heat the whole to ebullition. When the lac is dissolved, cool the solution, and impregnate it with chlorine, till the lac is all precipitated. The precipitate is white, but its colour... 
