How to make colours or pigments from vegetables and green leaves available , to use them art paintings?
Natural Pigments are usually powders made from fine particles of a crushed substance, and for pigments from living matter often the slower you dry them the better they keep their original colour. You could try grating or shredding the leaves then allowing them to dry before grinding to a powder, or perhaps simmering in water for an hour or so before reducing the mixture down. For earth pigments cook the oil in the oven for an hour to dry and sterilise it, before mixing with a carrier. If you use a dry pigment you will also need some sort of carrier/binder, and egg tempera is a traditional and environmentally friendly way to do this. Tempera is a mix of egg yolk and pigment, often with the addition of a small amount of oil and vinegar (oil helps the paint “spread”, vinegar helps it to dry). I added a link below for some recipes, but you could just use egg yolk and pigment with a drop of vinegar to help it dry and preserve. this mixture should be kept in the fridge and discarded after 3
