Sliced Black Olives By Two Brother For olives 4 customer reviews Ripe Oxidized black olives They are not naturally ripe and their colour -intensely black- comes from an industrial oxidation process where typically green olives are subject to strong alkaline treatments and exposed to iron salts, then packed in specific tins such as A10 & A12 tins then be sterilized in autoclave. Ripe black olives may be : (a) whole black olives (b) sliced black olives (c) pitted black olives
