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.

About this Item

Title
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.
Author
Haudicquer de Blancourt, Jean, b. ca. 1650.
Publication
London :: Printed for Dan. Brown ... Tho. Bennet ... D. Midwinter and Tho. Leigh ... and R. Wilkin ...,
1699.
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Subject terms
Glass manufacture -- Early works to 1800.
Enamel and enameling -- Early works to 1800.
Precious stones.
Cite this Item
"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." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A43083.0001.001. University of Michigan Library Digital Collections. Accessed May 5, 2024.

Pages

Page 334

CHAP. CCXLVII. How to blanch fine Pearl.

THE Beauty of Pearl consists entirely in the Brightness of their White Colour, such as are Spotted, or of a dark Yellow, being the least estimable; you may however restore these last to a true Luster and Whiteness, by letting them soak and cleanse first in Bran-Water, then in Milk-warm Water, and last of all steep them twenty four Hours in the Mercury-Water assigned Chap. 244. This done, string and hang them in a well closed Glass Body, to dry in the Sun, as before.

The Bran-Water is made by boiling two good Handfuls of Wheaten-Bran in a Quart of Water, until the Water has drawn all the Strength thereof to it; and thus you are to use it afterwards for cleansing the Pearl; you must string and lay them all together in a glazed Earthen Pan, and pour there∣on one third of this Water, when they have soaked, until the Water be tolerably cooled, that you may endure the heat, rub them with your Hands gently to cleanse them the better; continue so until the water be cold, throw out this cold water, and pour on another third part of the Bran-water still boil∣ing, and so use it as the former, throwing it away when cold, and then pouring on the remainder of the water, proceeding still after the former man∣ner; after this, just heat some fair water, and pour it on them, to refresh and take away the Remains of the Bran; shift this water, pouring on more fresh warm water; do thus thrice without handling them, then lay them on a Sheet of very clean white Paper,

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to dry in a Shade, and last of all steep them in your Mercury-water, to bring them to Perfection.

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