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23 August 2026
- 14:0314:03, 23 August 2026 Ochres, umbers and other natural earth pigments of England and Wales (hist | edit) [62,352 bytes] Scotfot (talk | contribs) (Created page with "= Wartime pamphlet no. 21. - Ochres, umbers and other natural earth pigments of England and Wales = By R.W. Pocock = Introduction = Natural mineral pigments include such materials as ochres, umbers and siennas (Ladoo, 1925). Some pigments are made by mixing natural mineral pigments with chemically manufactured pigments, and in the preparation of mixed paints for use it is customary to mix two or more pigments together to produce a paint with the specific colour and pr...")