VIEW THE MOBILE VERSION of Informational Site Network Informational
  Home - Chromatography - Color Value - Aesthetics - Photography

Sorgho Red

Some nine years back there was found to be a carmine colouring matter in
most parts of the Chinese sorgho, chiefly in the unpressed stem. The
red, which is extracted in an impure state, is dissolved in weak
potash-ley, thrown down by sulphuric acid, and washed with water. This
purified product, soluble in alcohol, caustic alkalies, and dilute
acids, has been employed in Austria, Baden, &c., for the dyeing of silks
and woollens with the common tin mordants. The colours produced from it
are unchanged, they say, by warm soapsuds or light. We do not know
whether the red found its way to England, but it has certainly not
appeared here as a pigment.

Next: Thallium Red

Previous: Silver Red

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 1940