brass cleansing

Значение термина brass cleansing в knolik

• Wash with rock alum, boiled in a strong lye in the proportion of 1 oz. to a pint; polish with dry tripoli.
• Make a mixture of 1 part common nitric acid and ½ part sulphuric acid, in a stone jar, having also ready a pail of fresh water and a box of sawdust. The articles to be treated are dipped into the acid, then removed into the water, and finally rubbed with sawdust. This immediately changes them to a brilliant colour. If the brass has become greasy, it is fir t dipped in a strong solution of potash and soda in warm water; this cuts the grease, so that the acid has free power to act.
• Rub the surface of the metal with rottenstone and sweet oil, then rub off with a piece of cotton flannel, and polish with soft leather.
• A solution of oxalic acid rubbed over tarnished brass soon removes the tarnish, rendering the metal bright. The acid must be washed off with water, and the brass rubbed with whiting and soft leather.
• A mixture of muriatic acid and alum dissolved in water imparts a golden colour to brass articles that are steeped in it for a few seconds.
• Put a coat of nitric acid over the part you want cleaned, with a piece of rag; as soon as it turns a light yellow, rub it dry, and the brass will present a very clean appearance; if not, repeat.
• Oxalic acid and whiting mixed and applied wet, with brush, and brushed again when dry with soft plate-brush, polishing with dry whiting.

Brass Instruments cleansing

• If the instruments are very much oxidised or covered with green rust, first wash them with strong soda and water. If not so very bad, this first process may be dispensed with. Then apply a mixture of 1 part common sulphuric acid and 12 of water, mixed in an earthen vessel, afterwards well scouring with oil and rottenstone, and finally using a piece of soft leather and a little dry rottenstone to give a brilliant polish. In future cleaning, oil and rottenstone will be found sufficient. To hold the instrument, get a piece of wood turned to insert in the bells; fix in a bench vice. The piece of wood will also serve for taking out any dents you may get in the bells.
• Dissolve some common soda in warm water, shred into it some scraps of yellow soap, and boil it till the soap is all melted. Then take it from the fire, and when it is cool add a little turpentine, and sufficient rottenstone to make a stiff paste. Keep it in a tin box covered from the air, and if it get hard, moisten with a small quantity of water for use.

Brass or Copper

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