A story of blue
15:15
A Invenção do Azul
13:02
The Story of Blue
11:45
Why does this lady have a fly on her head? | 'Portrait of a Woman of the Hofer Family'
12:05
Vivianite pigment - the blue ocher
6:13
Fra Angelico blue pigment extraction
18:09
In Search of Forgotten Colours - Sachio Yoshioka and the Art of Natural Dyeing
4:43
Ancient Art: Making earth pigments
8:21