 | 1771 - 414 pages
...bleaching liquor, and thus proceed till the colour of the mixture becomes pale ; a second bleaching liquid is now to be added, made by diluting muriatic acid...fresh portion is poured in. This is to be continued till the lac, now white, separates from the liquor. The supernatant fluid is now to be poured away,... | |
 | Royal Society of Arts (Great Britain) - Industrial arts - 1827 - 650 pages
...liquor, and thus proceed till the colour of the mixture has become pale. A second bleaching liquid is now to be added, made by diluting muriatic acid...fresh portion is poured in. This is to be continued till the lac, now white, separates from the liquor. The supernatant fluid is now to be poured away,... | |
 | Industrial arts - 1828 - 942 pages
...bleaching liquor, and thus proceed till the colour of the mixture becomes pale ; a second bleaching liquid is now to be added, made by diluting muriatic acid...fresh portion is poured in. This is to be continued till the lac, now white, separates from the liquor. The supernatant fluid is now to be poured away,... | |
 | Luke Herbert - Industrial arts - 1828 - 396 pages
...takes place, and when this ceases, add more to the bleaching liquor, and thus proceed till the colour of the mixture has become pale. A second bleaching...small quantities at a time are to be added to the half bleached lac solution, allowing the effervescence which takes place on each addition to cease... | |
 | Gill's scientific, technological and microscopic repository - 1828 - 436 pages
...liquor, and thus proceed till the colour of the mixture has become pale. A second bleaching liquid is now to be added, made by diluting muriatic acid...small quantities at a time are to be added to the half bleached lac solution, al* From vol. XLV. of the Transactions of the Society for the encouragement... | |
 | Meteorology - 1828 - 888 pages
...is now to be added, made by diluting muriatic acid with thrice its bulk of water, and dropping info it pulverized red lead, till the last added portions...small quantities at a time are to be added to the half bleached lac solution, allowing the effervescence which takes place on each addition to cease... | |
 | Luke Hebert - Industrial arts - 1835 - 938 pages
...pale. A second bleaching liquor is now to be added, made by diluting muriatic acid with thrice it» bulk of water, and dropping into it pulverized red...small quantities at a time are to be added to the half bleached lac solution, allowing the effervescence, which takes place on each addition, to cease... | |
 | Luke Hebert - Industrial arts - 1836 - 942 pages
...takes place, and when this ceases, add more to the bleaching liquor, and thus proceed till the colour of the mixture has become pale. A second bleaching...small quantities at a time are to be added to the half bleached lac solution, allowing the effervescence, which takes place on each addition, to cease... | |
 | Luke Hebert - Industrial arts - 1846 - 944 pages
...liquor, and thus proceed till the colour of the mixture has become pale. A second bleaching liquor u now to be added, made by diluting muriatic acid with...small quantities at a time are to be added to the half bleached lac solution, allowing the effervescence, which takes place on each addition, to cease... | |
 | John Geddes M'Intosh - Oils and fats - 1911 - 540 pages
...muriatic acid with thrice its bulk of water, and dropping into it pulverized red-lead till the last portions do not become white. Of this acid bleaching...quantities at a time are to be added to the half-bleached shellac solution, allowing the, effervescence, which takes place on each addition, to cease before... | |
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A second bleaching liquid is now to be added, made by diluting muriatic acid with thrice its bulk of water, and dropping into it pulverized red lead, till the last added portions do not become white. Of this acid bleaching liquor, small quantities at... 
