The ores of Bismuth, as well as Cobalt, yield a matter that colours glass blue; nay, the Smalt made with these ores is more beautiful than that procured from the ore of pure Arsenic.
He also proves, in the Memoirs he hath given in on this subject, that the Nitrous Acid is the true solvent of those ores of Bismuth which contain moreover Smalt and Arsenic.
Sometimes a little indigo blue or smalt is also added, when a peculiar bloom colour is desired.
One process for making fine smalt has been given under the title AZURE; I shall introduce another somewhat different here.
In the works where cobalt ores are treated, a blue glass is prepared with the zaffre, which is well known under the name of smalt or azure blue.
If the starch is to have the blue tint, called Poland, fine smalt must be mixed in the liquor of the last sieve, in the proportion of 2 or 3 lbs.
Melt the Wax, then add the Nutritum to it, after the Smalt finely powdered has been exactly incorporated with it; stirring it about with an Iron Spatula or Rod, till the whole is well mixed and cold.
A Quarter of an Ounce of Smalt may also be mixed exactly with two Ounces of Butter or Ointment of Lead, to be used occasionally instead of the Plaister.
Take one Pugil of Camomile Flowers, and as much Elder Flowers, bruising them well; of fine Flour or Starch three Ounces; of Ceruss and of blue Smalt each half an Ounce.
At present, smalt of a good colour is often purchased therefore at a dear rate; and it is in greater request, as it is certain that its colour is more durable in fire than even that of the lapis lazuli.
The use of cobalt does not imply a knowledge of its metal; for the moderns made brass and smalt for whole centuries, before they learned to prepare zinc and regulus of cobalt.
It is well known also that the Chinese and people of Japan gave to their porcelain that fine blue colour, for which it is celebrated, long before the discovery of smalt in Europe.
The objection that the ancients made blue glass and blue enamel, and if they had not smalt they could use no other pigment that would stand fire but ultramarine, I shall answer in the next article.
With smalt or azure you may make it blue; with white-lead white, and with orpiment yellow.
For my part, I find in this passage as few traces of smalt as M.
The broad petals are afterwards coloured as follows:--first vein the lower ends with cake smalt and crimson, using for the purpose a fine sable brush.
The whole is painted with deep rich blue, produced by mixing cake smalt with the middle blue in powder.
The dark velvet-purple-looking spot seen in geraniums is obtained from mixing the cake smalt with a little bright crimson powder.
It was applied to this purpose till the invention of painting in oil, and the discovery of Prussian blue, smalt and other pigments of a superior quality.
If you want a fine blue colour dissolve the smalt made with tartar, and then remove the salt.
GREEN SOAP is a mixture of palm oil soap and curd soap, to which is added powdered smalt ground with water.
The cream colored in this way has a blue tint; when it is required of a purple color we have merely to stain the white saponaceous cream with a mixture of vermilion and smalt to the shade desired.
With mercurous nitrate, the platinocyanide of potassium forms a thicksmalt blue, and the platinidcyanide a dark blue precipitate.
For this last purpose, however, smalt is not perfectly adapted, the colour being difficult to lay on uniformly, and the paper when written on blunting the nibs of pens.
The bestsmalt in lumps appears black, yields a blue powder on grinding, becomes paler on further grinding, and may be almost decolourised by continued and excessive grinding.
The inferior kinds of smalt are occasionally adulterated with chalk.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "smalt" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: blue; color; pigment
