a. and sb. [UNDER-2.]
1. Under-glaze painting, the process of painting on pottery before the application of the glaze.
1883. Harpers Mag., July, 259/1. The underglaze painting of pottery.
1885. Encycl. Brit., XIX. 643/2.
b. absol. as sb. in the same sense.
1882. Worcester Exhib. Catal., iii. 4. Plaques painted in under-glaze.
1884. American, VII. 217. The mysteries of overglaze and underglaze.
2. Of colors: Used in, adapted for, this method of decoration.
1883. American, VII. 119. The good effects of underglaze colors depend so essentially upon the firing.
1885. Encycl. Brit., XIX. 643/2. The soft subdued colours of the underglaze pigments.