Bugs, Cancer,  Renoir and Image Restoration:  part 3

Bugs, Cancer, Renoir and Image Restoration: part 3

In the first two parts of this blog thread we discussed a few basics about anthroquinone dyes.  We discovered that these organic dyes were used by many painters, especially some of the Impressionists, to produce bright red and blue colors.  Then we reviewed how two...
Bugs, Cancer,  Renoir and Image Restoration:  part 2

Bugs, Cancer, Renoir and Image Restoration: part 2

Last post I introduced a brief introduction to quinolone dyes.  Very quickly, they are organic dyes that were naturally occurring, the quinone structure absorbs and reflects light of varying wavelength (color), and the quinone structure shows a tendency to undergo a...