Watch Kisslip Cuttlefish Changing Colors from
Monterey Bay Aquarium
Sepia, the name of a cuttlefish, also of a pigment used by painters to produce a beautiful brown color prepared from the secretion of an organ in the cuttlefish, called the ink bag. The original black color is changed to brown by dissolving in caustic potash. This solution, after boiling and filtering, forms the sepia of commerce. The black coloring matter obtained from the ink bags is marketed, after undergoing several processes, as India ink.
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