A film series and discussion forum dedicated to the science and practice of natural dyes and pigments using sustainable methods.
Lime is a general term for calcium-containing inorganic materials, in which carbonates, oxides and hydroxides predominate. The rocks and minerals from which these materials are derived, typically limestone or chalk, are composed primarily of calcium carbonate. “Burning” (calcination) converts them into the highly caustic material quicklime (calcium oxide, CaO) and, through subsequent addition of water, into the less caustic (but still strongly alkaline) slaked lime or hydrated lime (calcium hydroxide, Ca(OH)2), the process of which is called slaking of lime.
Lime or Calcium hydroxide, Ca(OH)2 can be purchased from builders’ supply or chemical supply or simply make it yourself by baking/burning shells after you ate the shell fish at around 1000C for 20 minutes and pounding it finely.