Ripe Oxidized Black Olives

Ripe Oxidized black olives (California style )

   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