For tinning brass and copper vessels: The plates or vessels of brass or copper boiled with a solution of stannate of potassia, mixed with turnings of tin, become, in the course of a few minutes, covered with a firmly attached layer of pure tin. (2) A similar effect is produced by boiling the articles with tin-filings and caustic alkali, or cream of tartar. In this way chemical vessels made of copper or brass may be easily and perfectly tinned.
Have your metal clean, by first scouring, and then swabbing out with dilute acid. Then heat it, and with a wisp of greasy tow rub the molten tin all over. In the dipping process all you have to do is to get the pieces quite clean, and then immerse in a tank of oil or tallow, and when hot pass into the tank of molten tin.
To tin cloth, a mixture of finely pulverized metallic zinc and albumen, of about the consistency of thin paste, is spread with a brush upon linen or cotton cloth, and by means of hot steam coagulated. The cloth is now immersed in a bath of stannic chloride, well washed and dried. Running the cloth through a roller press, the tin film is said to take metallic lustre. Designs cut in stout paper, letters, numbers, etc., when laid between cloth and roller, are impressed upon it. It can also be cut in strips, corners, etc.
To tin small articles, dissolve as much zinc scraps in muriatic acid as it will take up, let it settle, then decant the clear and it is ready for use. Next prepare a suitable iron vessel, set it over the fire, put your tin therein, and melt it, and put as much mutton or beef tallow as will cover the tin about one-fourth inch thick. This prevents the oxidation of the metal; but be careful that the tallow does not catch fire. The iron, or any other metal to be tinned, must be well cleaned, either with scraping, filing, polishing with sand, or immersed in diluted vitriol. Proceed to wet the articles in the zinc solution, then carefully immerse them in the tallow and melted tin; in a very short time they will become perfectly tinned, when they may be taken out.
Heat the copper red-hot and file it; have on hand a piece of sal-ammoniac and rub the copper upon it; then put on a little solder.
To test tin pipe to find whether there is any lead there or not, proceed as follows: On the tinned surface place some string nitric acid, and with a splinter of wood rub it over the surface as large as a 25-cent piece; allow it to dry; when dry two drops of a solution of bi-chromate of potassium should be dropped on the same place. If the tin contains lead, a bright yellow crust of chromate of lead will form on the spot. The test is a very simple one, yet thoroughly reliable, and is decisive.
Tin putty from glowing oxalate of tin, which is a product of the decomposition of tin-salt with oxalic acid.