A Dictionary of Arts: P. Pearl White. Pigments, vitrifiable. Purple of Mollusca. Purpuric acid. Purpurine.

A Dictionary of Arts, Manufactures, and Mines; containing A Clear Exposition of Their Principles and Practice

by Andrew Ure, M. D.;
F. R. S. M. G. S. Lond.: M. Acad. M. S. Philad.; S. PH. DOC. N. GERM. Ranow.; Mulh. Etc. Etc.

Illustrated with nearly fifteen hundred engravings on wood
Eleventh American, From The Last London Edition.
To which is appended, a Supplement of Recent Improvements to The Present Time.

New York: D Appleton & company, 200 Broadway. Philadelphia: George S. Appleton, 148 Chestnut St.
MDCCCXLVII

1847

PEARL WHITE, is a submuriate of bismuth obtained by pouring a solution of the nitrate of that metal into a dilute solution of sea salt, whereby a light and very white powder is obtained, which is to be well washed and dried. See BISMUTH.

PIGMENTS, VITRIFIABLE, belong to five different styles of work: 1. to enamel painting; 2. to painting on metals; 3. to painting on stoneware; 4. to painting on porcelain; 5. to stained glass.

PURPLE OF MOLLUSCA is a viscid liquor, secreted by certain shell-fish, the Buccinum lapillus, and others, which dyes wool, &c. of a purple color, and is supposed to be the substance of the Tyrian dye, so highly prized in ancient Rome for producing the imperial purple. See DYEING.

PURPURIC ACID is an acid obtained by treating uric or lithic acid with dilute of nitric acid. It has a fine purple color; but has hitherto been applied to no use in the arts.

PURPURINE is the name of a colouring principle, supposed by Robiquet and Colin to exist in madder. Its identity is questionable.