substanceClay ContainsColors & materialsA named craft material / finish lemma (Clay Contains) drawn as an exact public-domain workshop phrase.Clay Contains is historically related to Clay.potters-craft seats orphan clay-contains beside clay as a first craft peer — object speech, not a text-container or tradition dump.from Charles Fergus Binns · The Potter's Craft: A Practical Guide for the Studio and Workshop, PD Gutenberg #40411historically related to · sourced · documentedsourcesThe Potter's Craft: A Practical Guide for the Studio and Workshop · Charles Fergus BinnsBinns, The Potter's Craft (PD Gutenberg ed.).