Hence the peculiar properties of cyanine remain unchanged only so long as the Prussian blue itself, the pigment losing its colour by degrees on exposure to air and light, and gradually assuming the tint of the paler but more permanent cobalt.
Whether these remarks are applicable to cyanine or not is a question for artists to decide: in our opinion, with so many semi-stable original pigments, the introduction of semi-stable compounds is to be deprecated.
However that may be, in these days both names signify cobalt compounds, coeruleum being a stannate of cobalt, and cyanine a mixture of cobalt and Prussian blue.
Among the semi-stable, must be classed cyanine or Leitch's blue, smalt, and Prussian blue.
Within the last few years, a compound similar to cyanine has appeared, under the name of Leitch's Blue.
Sulphon cyanine works well with other dye-stuffs, and gives shades which are fast to milling.
Scarlet-red flowers also contain cyanine reddened by an acid, but in such cases this substance is mixed with a yellow coloring matter which we will now describe.
In the same way by filling the part of the square with the pigment on which the shadow illuminated by the reflected beam falls, we can see if we can match emerald green, cyanine blue, and other coloured pigments.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "cyanine" in a variety of sentences. We hope that you will now be able to make sentences using this word.
