Abstract
Drawings and specifications for two small commercial kilns, one small test kiln, and a frit furnace are shown. Glazes suitable for use in the kilns are described. Shales and No. 2 fire clays are suggested for use. Reference is made to ware of commercial quality now being made in kilns of the kind indicated. Two sorts of copper red glazes are discussed and reference is made to the use of salt in effecting changes in the character of glazes. Fritted mat glazes are discussed and endorsed as superior to the raw sort, because of greater flexibility. A kiln atmosphere charged with vapors of common salt effects interesting changes in both the character of glazes and the usual colors produced by the commonly used oxides. A normally glossy, bright, and clear glaze becomes a vellumlike mat when fired in the presence of NaCl under certain conditions. A positive method of producing low-fired copper reds and lusters is described.
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