Ultramarine Deep

Color number 506
+++
transparent
PB29
Series 2

Lightfastness
+++  = 100 years complete lightfast under museum circumstances 
++ =   25 – 100 years lightfast under museum circumstances 
The lightfastness of all these colours has been tested in accordance with ASTM Standards D4303.

Opacity/transparency

The Colour Index
The pigments used in our paint are indicated according to the Colour Index.
The Colour Index is a system applied internationally to pigments and colouring
agents used in all types of paint, thus including artists’ colours. The system is
based on a number and name relating to the chemical structure. The Colour
Index was originally developed in the USA, which is why the descriptions of the
chemical classes are given in English. The meaning of the abbreviations is as
follows:

reference: www.talens.com