Page:United States Statutes at Large Volume 77A.djvu/249

 TARIFF SCHEDULES OF THE UNITED STATES TARIFF SCHEDULES OF THE UNITED STATES

SCHEDULE 5. - NONMETALLIC MINERALS AND PRODUCTS Part 2, - Ceramic Products

235 Rates of Duty

PART 2. - CERAMIC PRODUCTS Part 2 headnot-es: 1. This part covers ceramic wares, and articles of such wares and, in addition, certain unshaped refractory material (subpart A) closely related thereto. 2.

For the purposes of the tariff schedules — (a) a "ceramic article" is a shaped article having a glazed or unglazed body of crystalline or substantially crystalline structure, which body is composed essentially of inorganic nonmetallic substances and either is formed from a molten mass which solidifies on cooling, or is formed and subsequently hardened by such heat treatment that the body. If reheated to pyrometric cone 020, would not become more dense, harder, or less porous, but does not Include any glass artIcle; (b) the term "earthenware" embraces ceramic ware, whether or not glazed or decorated, having a fired body which contains clay as an essential ingredient and will absorb more than 3.0 percent of Its weight of water; (c) the term "stoneware" embraces ceramic ware whether or not glazed or decorated, having a fired body which contains clay as an essential ingredient, is not commonly white, will absorb not more than 3.0 percent of Its weight of water, and Is naturally opaque (except in very thin pieces) even when fully vitrified; (d) the terra "subporcelain" embraces finegrained ceramic ware (other than stonewarel, whether or not glazed or decorated, having a fired body which is white (unless arti f iciaIly colored) and will absorb more than 0.5 percent but not more than 3.0 percent of its weight of water; (e) the terms "ch inaware" and "porcelain" embrace fine-grained ceramic ware (other than stoneware), whether or not glazed or decorated, having a body which Is white (unless artificially colored) and will not absorb more than 0.5 percent of its weight of water; (f) the term "bone chInaware" embraces chlnaware or porcelain the body of which contains by weight 25 percent or more of calcined bone; (g) the term "nonbone chlnaware" embraces chinaware or porcelain other than bone chlnaware; (h) the term "coarse-grained", as applied to ceramic ware, embraces such wares having a body made of materials none of which had been washed, ground, or otherwise benefIclated; (I) the term "fine-grained", as applied to ceramic wares, embraces such wares having a body made of materials any of which had been washed, ground, or otherwise benefIclated; and (j) the term "body" Includes any engobe or body slip, except engobe or body slip applied to the body as a decoration; and (k) the water absorption of a ceramic body shall be determined by ASTM test method designated C373-56 (except that test specimens may have a minimum weight of 10 grams, and may have one large surface glazed).

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