23 Cement for Broken China, Glass and Earthenware
To half a pint of skimmed milk, add an equal quantity of vinegar to curdle it, then separate the curd from the whey, and mix the curd with the whites of five eggs, beat the whole well together, then add enough of the finest quicklime to form a consistent paste. (Plaster of Paris is still better if it can be procured, than lime.) Rub this mixture on the broken edges of the china or glass, match the pieces and bind them tightly together, and let them remain bound several weeks. They will then be as firm as if never broken. Boiling crockery in milk is a good thing to cement them, the pieces should be matched, bound with pieces of cloth, and boiled half an hour, they should remain in the milk till cold, and not be used for several weeks. Pulverized quicklime mixed with the white of an egg and rubbed in the cracks of china and glass, will prevent their coming apart; the dishes should be bound firmly for several weeks, after it is rubbed in. The Chinese method of mending broken china, is to grind flint glass, on a painter’s stone, as fine as possible, and then beat it, with the white of an egg to a froth, and lay it on the edges of the broken pieces. It should remain bound several weeks. It is said, that no art will then be able to break it in the same place.