26 VITREOUS ENAMELING 



1*150.772. I. Kreidl. Opaquing material for white enamels. Aug. 17, 

 1915. C.A., 9, 2701. (217,976). 



Alkaline compound of zirconium formed by treating with acid and washing 

 to remove part of the combined alkali. 



ii53748. C. Baezner. Opaque enamel or glazing composition for use 

 on sheet iron, etc. Sept. 14, 1915. C. A., 9, 3343. (218, 528). 



1,178,469. H. G. Higley. Enameling iron. Apr. 4, 1916. C. A., 10, 

 1587. (225, 320). 



The iron is immersed in a bath prepared from dilute sulfuric acid, ferric 

 oxide and an enamel composition. 



1,181,944. J. Weber. Coloring enamels. May 2, 1916. C. A. t 10, 

 1701. (226, 286). 



Neutralized anhydrous calcium stannate is used as an opaque coloring. 



1.196,342. Alfred de Back. Method of recovering iron, steel, and the 

 like from waste enameled articles. Aug. 29, 1916. (229, 1393). 



1,196,243. Alfred de Back. Apparatus for disintegrating metal articles. 

 Aug. 29, 1916. J. Soc. Chem. Ind, 35, 1012. (229, 1393). 



1,197,618. Arthur W. Forbes. Enameling apparatus. Sept. 12, 1916. 

 (230, 352). 



1,203,409. R. Rickmann. White opaque enamels. Oct. 31, 1916. C. 

 A., 11,93. (231, 1446). 



Small proportion of potassium antimoniate is added. 



1,205,845. H. A. Biggar. Enameling composition for use on metals. 

 Nov. 21, 1916. C. A. n, 198. (232, 869). 



A mixture of various asphalts, rosin, Portland cement, etc., is used. 



1,220,253. M. Meyer and B. Havas. Opaque white enamels. Mar. 27, 

 1917. C. A., n, 1735. (236, 937). 



A mixture of titanium oxide and zirconium oxide is used for opaquing 

 white enamels. 



1.230,958. K. Warga. Coating aluminium with vitreous enamel. June 

 26, 1917- C. A., n, 2323. (239, 989). 



1,239,112. H. Kretzer and A. Cappel. Opaque enamels. Sept. 4, 1917. 

 C. A., n, 3407. (242, 126). 



The opacifying agent, e. g., a compound of Zr, Ti, Si, Al, Zn, or alkaline 

 earth metal, is added to the other ingredients of the enamel after they have 

 been at least partially ground in a wet mill, together with substances which 

 precipitate colloids, such as ammonium chloride, magnesium sulfate, or 

 chloride, or sodium sulfate. 



1,249,937. P. Eyer. Ground enamel. Dec. n, 1917. C. A. t 12, 414. 

 (245, 469). 



Ore containing cobaltic oxide, freed from sulfur and arsenic, is used to 

 color the enamel. 



1,256,455, 1,256,456. P. Eyer. Enamel for iron. Feb. 12, 1918. C. 

 A., 12, 986. (247, 433). 



White enamel for glass consisting of ruby glass, clay, cryolite and sodium 

 carbonate. 



