- In soldering tin-ware, especially in mending old ware, the use of soldering liquids will greatly help. There are several of these. The best is made as follows: Get any convenient vial about half full of muriatic acid; procure at the tin-shop some scraps of sheet zinc; if you have no strong shears, let the tinsmith cut the zinc into strips narrow enough to enter the vial. Place the vial out-doors, or under a shed, and add a strip or two of zinc. A great bubbling or boiling will take place as the zinc dissolves. As one piece of zinc dissolves add another, and when a piece remains without any action or bubbling of the liquid, it is done. Fit to the lower end of the cork a piece of stick to reach into the liquid; after the liquid is perfectly quiet, cork it. In soldering, wet the place where the solder is to go, with this liquid; the drop or two that the stick will take up is enough. Do not get this liquid on the clothing, or on the skin, as it may irritate it and make it feel very rough.