The art of glass shewing how to make all sorts of glass, crystal and enamel : likewise the making of pearls, precious stones, china and looking-glasses : to which is added, the method of painting on glass and enameling : also how to extract the colours from minerals, metals, herbs and flowers ... : illustrated with proper sculptures / written originally in French, by Mr. H. Blancourt, and now first translated into English ; with an appendix, containing exact instructions for making glass-eyes of all colours.

CHAP. CXLIX. To make Enamel of a Milk-white Colour.

THIS Colour of all others is the purest; 'tis used for the Ornaments of Virginity, the Em∣blem of Innocence, as also the Symbol of Candour and Chastity. Nay more, we may even from it form a pretty and impressive Idea of the Bright∣ness and Excellency of Faith; and 'tis what has ever been esteemed and revered by all Nations.

We have already shew'd how to tinge Glass of this Colour, in Chap. LXX. of the Third Book, and now we will shew how to perform the like on Ena∣mel with no less Beauty, and very easily; thus: Take six pound of our prepared Powder, in the for∣mer Chapter, and forty eight Grains of Magnese of Piedmont, prepared as in Chap. XVIII. put them will together into one of your Furnace-Pots to melt and purifie over a very swift Fire, which will

be done in a little time. The Matter being thus melted, take it out of the Pot, and throw it into very fair Water, and being afterwards dryed, put it again into the Pot to melt; do thus with it thrice, changing the Water. When you have thus purified it, if you find it justly white, 'tis good; but if it be greenish, add a little more Magnese, and 'twill become white as Milk, and fit Enamel for Gold, or other Metal. Take it off the Fire, and make it up into Cakes, and keep them for use.