substanceOil CoversColors & materialsA named craft material / finish lemma (Oil Covers) drawn as an exact public-domain workshop phrase.Oil Covers is historically related to Oil.paint-colour-mixing seats orphan oil-covers beside oil as a first craft peer — object speech, not a text-container or tradition dump.from Arthur Seymour Jennings · Paint & Colour Mixing, PD Gutenberg #56738historically related to · sourced · documentedsourcesPaint & Colour Mixing · Arthur Seymour JenningsArthur Seymour Jennings, Paint & Colour Mixing (PD Gutenberg ed.).