Iodine Blue

It is curious that iodine, which gives a yellow with lead, should also

afford a blue with the same metal. When a solution of iodine in aqueous

soda (carbonate of soda is not so good) is added to nitrate or acetate

of lead-oxide, a transient violet-red precipitate falls, which

decomposes spontaneously under water, yielding iodine and a beautiful

blue powder. The colour, however, is exceedingly fugitive, even the

carbonic acid of the air separating iodine from it and forming a lead

salt. Bearing in mind the scarlet iodide of mercury, iodine is capable

of furnishing the three primary colours, distinguished alike by their

brilliancy and fugacity.

Indium Yellow Iodine Pink facebooktwittergoogle_plusredditpinterestlinkedinmail