This type was popular among the poorer classes. The paste of pearlware produced after 1810 is heavier and whiter with a harder glaze that may vary in color from almost clear to deeply bluish tinted.
White to light cream-colored, thin, hard refined earthenware paste. White to faint bluish white clear lead glaze, caused by the addition of cobalt to the glaze. There is a bluish cast where the glaze pools. Hand painted floral designs, initially in brown, mustard, yellow and olive green, and, after 1830, pinkish-red, black, light blue, and light green shades were added to the palette.
Hume 1969 was also listed on the FLMNH website but the bibliographic information was not provided