Pigments
A wide array of Pigments are used in paints and plastics, and sometimes mortar. This article will just introduce some of the readily available low cost pigments useful for DIY colouring and experimentation.
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Coal Ash
- Black
- Incorporated into lime mortar to make black mortar
- Black mortar is sometimes prone to premature failure, so its use is best kept to being a minority of the mortar used.
Commercial Mortar Pigments
Tins of pigment are available from BMs at low cost, but most colours are prone to streaking and bleaching during the life of the mortar. Red pigment however is iron oxide, and is very stable.