It was used as a red pigment and an item of trade.

Both red and black pigment in the hair are diluted.

The red pigment fades from margin toward the center with age.

They are remarkable for the peculiar green and red pigments found in their feathers.

It has been cultivated for a red pigment derived from roots.

They shared their food with him and decorated his body in red pigments.

Its red pigment shades a collection of light sensitive crystals.

The majority of the burials were covered with red pigment.

The name actually referred to a red pigment from India.

The main function of iron is to form the red pigment in the blood called haemoglobin.