tannage (tanaj)

[ Urged that.. practical tanners be appointed by the government to make a scientific investigation into the relative merits of the several tannages , and to determine definitely, if po ible, for what purposes the different tannages could be advantageously used. Farrow, Mil. Encyc., II. 803. 3. In the manufacture of so-called artificial marble, the proce of steeping cast slabs of the material in a weak solution of potash alum, for the purpose of hardening the composition and rendering it insoluble. Also tanning. The most important operation in the composition of artificial Marbles is that of tannage , without which it would be impo ible for the cabinet maker to scrape and polish the material. Marble-Worker, § 129. 4. Browning from exposure to the sun and air, as the human skin. [Rare.] They should have got his cheek fresh tannage Such a day as to-day in the merry sunshine. Browning , Flight of the Duche , iii. tannate (tan'āt), n. [ tannate . The tannates are characterized by striking a deep