Composition of paints

http://www.substech.com/dokuwiki/doku.php?id=composition_of_paints

Composition "schématique" de la peinture

http://www.decoration-peinture.org/composition_schematique_de_la_peinture.php?offset=1

Site bien sympa et explications qui me semblaient intéressantes.

Composition de la peinture et différentes sortes

Basé sur: https://fr.wikipedia.org/wiki/Peinture_(mati%C3%A8re)#Composition

Donne la composition des différentes peintures, qui est intéressant pour savoir si c'est une suspension, émulsion ou autres. Donne aussi des informations sur les peintures contenant des polymères

opal and structural coloration (wikipedia)

Opal:

 The internal structure of precious opal makes it diffract light. Depending on the conditions in which it formed, it can take on many colors. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black. Of these hues, the black opals are the most rare, whereas white and greens are the most common. Opals vary in optical density from opaque to semitransparent.

https://en.wikipedia.org/wiki/Opal

Structural colorarion:

Structural colouration is the production of colour by microscopically structured surfaces fine enough to interfere with visible light, sometimes in combination with pigments. For example, peacock tail feathers are pigmented brown, but their microscopic structure makes them also reflect blue, turquoise, and green light, and they are often iridiscent
.
https://en.wikipedia.org/wiki/Structural_coloration