 | 1771 - عدد الصفحات: 440
...mercury in nitric acid, or I immerse it in a boiling and concentrated solution of chloride of zinc, for a period varying from one to five minutes, according to the strength of the solution. And in either case I afterwards wash the materials well in some alkaline... | |
 | Arnold James Cooley - 1845 - عدد الصفحات: 878
...varnish, which must then he carefully rubbed over it, so as to form a thin and even coating ; allow the whole to cool, and scratch out the design in the common...will again acquire the property of dissolving iron. 1 have thus successfully employed the same materials three or four times. Iodine will, doubtless at... | |
 | William Newton - 1849 - عدد الصفحات: 510
...mercury, in nitric acid), or he immerses it in a boiling and concentrated solution of chloride of zinc for a period varying from one to five minutes, according to the strength of the solution; and, in either case, he afterwards washes the material with some alkaline... | |
 | William Newton, Charles Frederick Partington - 1849 - عدد الصفحات: 507
...mercury, in nitric acid), or he immerses it in a boiling and concentrated solution of chloride of zinc for a period varying from one to five minutes, according to the strength of the solution ; and, in either case, he afterwards washes the material with some alkaline... | |
 | Arnold James Cooley - 1850 - عدد الصفحات: 590
...them into a liquid paste, which must be moved about over the intended engraving, for a period rarying from one to five minutes, according to the depth of...that the -same etching-paste, by being kept for a lev/ days, will again acquire the property of dissolving iron. I have thus successfully employed the... | |
 | Arnold James Cooley - 1854 - عدد الصفحات: 1060
...varnish, which must then be carefully rubbed over it, so аз to form a thin and even coating ; allow the whole to cool, and scratch out the design in the common...property of dissolving iron. I have thus successfully »mployed the same materials three or four times, «odiiif will, doubtless, at no very distant period,... | |
 | Sheridan Muspratt - 1860 - عدد الصفحات: 320
...mercury, in nitric acid, or by immersing it in a boiling and concentrated solution of chloride of zinc, for a period varying from one to five minutes, according to the strength of the solution. In either case, the materials are afterwards well washed in some alkaline... | |
 | Arnold James Cooley - 1872 - عدد الصفحات: 1244
...into a liquid paste with n camel-hair pencil. The paste is then moved about over the intended etching, for a period varying from one to five minutes, according to the depth of the lines required to be produced. Afterwards the whole is removed, and reapplied, &c., as with the... | |
 | Hints - 1880 - عدد الصفحات: 172
...to cool, and etch out the design in the common way, with a needle or point ; then sprinkle over it a little powdered iodine, and at the same time add...will again acquire the property of dissolving iron. To travellers and amateurs who amuse themselves with the delightful art of etching, this method will... | |
 | Alexander Watt - 1881 - عدد الصفحات: 220
...into a liquid paste with a camel-hair pencil. The paste is then moved about over the intended etching for a period varying from one to five minutes, according to the depths of the lines required to be produced. Afterwards the whole is removed and reapplied, etc., as... | |
| |
... whole to cool, and scratch out the design in the common way, with a needle or point ; then sprinkle on a little powdered iodine, and at the same time add a few drops of water with a camel-hair pencil, and work them into a liquid paste, which must... 