cyanuret

Continue washing in this manner till there is no acid or copperas taste; then add to the gold in the bottom of the dish from 1-1/2 to 2 oz. cyanuret potassa, dissolved in about 1/2 pint pure soft water.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

Now dissolve one ounce of cyanuret of potassium in one pint of pure rain water, to which add the gold, and it is ready to use.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

Continue washing in this manner till no acid or salt taste remains; then add a quart or more of pure soft water, and cyanuret potassa enough to take it up, or nearly so.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

At all events every particle of dirt and grease must be removed; then suspend the article in the cyanuret of gold solution, with a small strip of zinc cut about the width of a common knitting needle, hooking the top over a stick which will reach across the top of the vessel or bottle holding the solution.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

This is done every way the same as gold plating (using coin) except that rock salt is used instead of the cyanuret of potassium to hold the silver in solution for use, and when it is of the proper strength of salt it has a thick curdy appearance, or you can add salt until the silver will deposit on the article to be plated, which is all that is required.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

Dissolve one ounce of nitrate of silver, in crystal, in 12 ounces of soft water; then dissolve in the water two ounces of cyanuret of potash; shake the whole together and let it stand until it becomes clear.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

If you do get it on the skin, cyanide (cyanuret is the same) of potassium, 1 drachm, to 2 ozs. of water, will take it off.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

If the article you are silvering or gilding corrodes or turns black, it wants a little more cyanuret.

Young's Demonstrative Translation of Scientific Secrets Daniel Young

He had beside him a glass of cyanuret of potassium, which he tried to conceal at my approach.

Part II, Chapter I of "Uranie" 1890

This will account for the long description of the cyanuret of potassium, while the preparation of the equally important and even more used acids, the sulphuric, muriatic, etc., commonly found in commerce, are altogether neglected.

American Hand Book of the Daguerreotype 1853