Yellow Dipping Metal

Copper, 32 lbs.; zinc, 2 lbs.; soft solder, 2 1/2 ozs.

Quick Bright Dipping Acid, For Brass Which Has Been Ormoloud

Sulphuric acid 1 gall.; nitric acid, 1 gall.

Dipping Acid

Sulphuric acid, 12 lbs.; nitric acid, 1 pint; nitre, 4 lbs.; soot, 2 handfuls; brimstone, 2 ozs. Pulverize the brimstone and soak it in water an hour. Add the nitric acid last.

Good Dipping Acid, For Cast Brass

Sulphuric acid, 1 qt., nitre, 1 qt.; water, 1 qt. A little muriatic acid may be added or omitted.

Dipping Acid

Sulphuric acid, 4 galls.; nitric acid, 2 galls.; saturated solution of sulphate of iron (copperas), 1 pint; solution of suphate of copper, 1 qt.

Ormolu Dipping Acid, For Sheet Brass

Sulphuric acid, 2 galls.; nitric acid, 1 pt.; muriatic acid 1 pt.; water, 1 pt.; nitre, 12 lbs. Put in the muriatic acid last, a little at a time and stir the mixture with a stick.

Ormolu Dipping Acid, For Sheet Or Cast Brass

Sulphuric acid, 1 gall.; sal ammoniac, 1 oz.; sulphur, (in flour,) 1 oz.; blue vitriol, 1 oz.; saturated solution of zinc in nitric acid, mixed with an equal quantity of sulphuric acid, 1 gall.

To Prepare Brass Work For Ormolu Dipping

If the work is oily, boil it in lye; and if it is finished work, filed or turned, dip it in old acid, and it is then ready to be ormeloed; but if it is unfinished, and free from oil, pickle it in strong sulphuric acid, dip in pure nitric acid, and then in the old acid, after which it will be ready for ormeloing.

To Repair Old Nitric Acid Ormolu Dips

If the work after dipping appears coarse and spotted, add vitriol till it answers the purpose. If the work after dipping appears too smooth, add muriatic acid and nitre till it gives the right appearance.

The other ormolu dips should be repaired according to the receipts, putting in the proper ingredients to strengthen them They should not be allowed to settle, but should be stirred often while using.