Richard Hummel Vase ID: 2066 | This file appears in: Cowan Pottery Museum Oriental red glaze began as a normal glaze used by Cowan Pottery. One batch made by the pottery using the glaze came out mottled, with black patches all over the pieces. Instead of throwing out the bad batch, Cowan decided to sell it, and the mottled oriental red pieces became one of Cowan's most popular colors. | Source: Rocky River Public Library Download Original File SourceRocky River Public Library "Richard Hummel Vase" appears in: Cowan Pottery Museum