 | 1771 - 414 pages
...drawn off and filtered; if not colourless, a little more charcoal must be added. When all the colour is removed, press the liquor through silk, as linen absorbs more varnish, and afterwards filter through fine blotting paper. In cases where wax contained in gum lac would be objectionable, filter... | |
 | Royal Society of Arts (Great Britain) - Industrial arts - 1827 - 650 pages
...be drawn off, and filtered; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...through fine blotting-paper. In cases where the wax contained in gum lac would be objectionable, filter cold ; if the wax be not injurious, filter while... | |
 | Gill's scientific, technological and microscopic repository - 1828 - 436 pages
...be drawn off, and filtered; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...through fine blotting-paper. • In cases where the wax contained in gum lac would be objectionable, filter cold; if the wax be not injurious, filter while... | |
 | Meteorology - 1828 - 888 pages
...be drawn off, and filtered; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...absorbs more varnish. and afterwards filter it through line blotting-paper. In cases where the wax contained in gum lac would be objectionable, filter cold;... | |
 | Industrial arts - 1828 - 942 pages
...drawn off and filtered; if not colourless, a little more charcoal must be added. When all the colour is removed, press the liquor through silk, as linen absorbs more varnish, and afterwards filter through fine blotting paper. In cases where wax contained in gum lac would be objectionable, filter... | |
 | Luke Herbert - Industrial arts - 1828 - 396 pages
...drawn off, and filtered ; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen absorbs more varnish, and after* wards filter it through fine blotting-paper. In cases where the wax contained in gum-lac would... | |
 | Luke Hebert - Industrial arts - 1835 - 938 pages
...be drawn off and filtered ; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...lac is objectionable, filter cold ; if the wax be nut injurious, filter while hot. This kind of varnish should be used in £a temperature of not less... | |
 | Luke Hebert - Industrial arts - 1836 - 942 pages
...be drawn off and filtered ; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...absorbs more varnish, and afterwards filter it through tine blottingpaper. In cases where the wax found combined with the lac is objectionable, filter cold... | |
 | 1839
...colourless, a little more charcoal must be added. When all the colour is removed, press the liqnor through silk, as linen absorbs more varnish, and afterwards filter it through blotting-paper. The beit Bronre for Bratt Work. — Take 1 Ib. of muriatic acid and $ Ib. of white... | |
 | Luke Hebert - Industrial arts - 1846 - 944 pages
...be drawn off and filtered ; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen...should be used in -a temperature of not less than 60° Fahr. ji dries in a few minutes, and is not afterwards liable to chill or bloom ; it ia therefore particularly... | |
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... animal charcoal, when a small quantity of the solution should be drawn off and filtered ; if not colourless, a little more charcoal must be added. When all colour is removed, press the liquor through silk, as linen absorbs more varnish, and afterwards... 
