process for the manufacture of glass with complementary to its education achieved by properties properties

摘要

1,256,711. Surface treatment of glass. PILKINGTON BROS. Ltd., J. LAWRENSON, and D. JONES. 12 March, 1969 [27 March, 1968], No. 14809/68. Heading C1M. Glass is maintained in contact with a molten electrically conductive body 30, the body containing an element capable of modifying the surface characteristics of the glass, under conditions which cause the element to diffuse into the glass, while effecting relative movement between the glass and the body and while inducing a gaseous flow over the glass surface emerging from contact with said body to remove any vapours originating from the molten body. The glass may be supported on a molten metal bath, and the molten body may be a salt, e.g. AgCl, or a metal, e.g. Sn, Pb, Bi, Sb, In, Zn, Tl or alloys based on Sn, Pb and Bi. The flow may be induced by blowing gas over the surface (Fig. 2) transverse to the direction of motion of the glass, or by suction (Fig. 4). The molten body preferably clings to a locating member 31, and the element may be induced to migrate into the glass by passing a current through the molten body 30, the glass and the bath 10 of molten metal, or by selecting suitable oxidizing conditions.