Wall Decor.ca - Download the EBook Thoughts on MaterialsInformational Site Network Informational
  Home - Chromatography - Color Value - Aesthetics - Photography

Wood-tar Blue

The colours obtained from coal-tar have become household words, and it
is not impossible that those from wood-tar may be some day equally
familiar. At present wood-tar is comparatively unexplored, but the fact
that picamar furnishes a blue is at least as suggestive and hopeful as
that transient purple colouration by which aniline was once chiefly
distinguished. As aniline is a product of coal-tar, so picamar is a
product of wood-tar; and as the former gives a purple with
hypochlorites, so the latter yields a blue with baryta-water. Both are
distinguished by coloured tests, but there is this advantage in the
picamar blue--it is comparatively permanent.

Picamar blue is produced when a few drops of baryta-water are added to
an alcoholic solution of impure picamar, or even to wood-tar oil
deprived of its acid. The liquor instantly assumes a bright blue tint,
which in a few minutes passes into an indigo colour. From [Greek: pitta]

Next: Pitch And [greek: Kallos] Ornament The Blue Is Named Pittacal

Previous: Tungsten Blue

Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 1945