Gold Coin/Ware Cleaner Acetic acid...................
2 parts
Sulphurie acid.............. 2 parts
Oxalic acid.................... 1 parts
Jewelers' rouge............ 2 parts
Distilled water............... 200 parts
Mix the acids and water and stir in the rouge, after first rubbing it up with a portion of the liquid. With a clean cloth, wet with this mixture, go well over the article.
Rinse off with hot water and dry.
Silverware Cleaner Make a thin paste of levigate (not precipitated) chalk and sodium hyposulphite, in equal parts, rubbed up in distilled water. Apply this paste to the surface, rubbing well with a soft brush. Rinse in clear water and dry in sawdust. Some authorities advise the cleaner to let the paste dry on the ware, and then to rub off and rinse with hot water.
Silver Coin Cleaner Make a bath of 10 parts of sulphuric acid and 90 parts of water, and let the coin lie in this until the crust of silver sulphide is dissolved. From 5 to 10 minutes usually suffice. Rinse in
running water, then rub with a soft brush and castile soap, rinse again, dry with a soft cloth, and then carefully rub with chamois.
Cleaning Silver Plated Ware Into a wide mouthed bottle provided with a good cork put the following mixture:
Cream of tartar...................... 2 parts
Levigated chalk..................... 2 parts
Alum........................................ 1 parts
Powder the alum and rub up with the other ingredients, and cork tightly. When required for use wet sufficient of powder and with soft linen rags rub the article, being careful not to use much pressure, as otherwise the thin layer of plating may be cut through.
Rinse in hot suds, and afterwards in clear water, and dry in sawdust. When badly blackened with silver sulphide, if small the article may be dipped for an instant in hydrochloric acid and immediately rinsed in running water.
Larger articles may be treated as coins are immersed for 2 or 3 minutes in a 10 per cent aqueous solution of sulphuric acid, or the surface may be rapidly wiped with a swab carrying nitric acid and in stantly rinsed in running water.
Cleaning Gilt Bronse Ware If greasy, wash carefully in suds, or, better, dip into a hot solution of caustic potash, and then wash in suds with a soft rag, and rinse in running water. If not then clean and bright, dip into the following mixture:
Nitric acid.......................... 10 parts
Aluminum sulphate........... 1 parts
Water................................. 40 parts
Mix, rinse in running water.