Ultramarine Blue has two main points of application in the paper manufacturing process: the whitening of cellulose pulp and the coloration of the outside coating on coloured and stucco papers.

Some paper manufacturers, who want to obtain an optical whitening especially under a light which is rich in ultraviolet rays, use the synergy produced by the effect of the Ultramarine Blue and a optical whitener. Both products are very compatible and do not present any problem.

In coloured and stucco papers, Ultramarine Blues have a lot of applications, either as blue pigment or as filler shade correctors since in paper coating treatment, high dose levels of pigments and white fillers are used.

The non-toxicity of Ultramarine Blue as well as the fact that the product is "environmental friendly" are added value in the very demanding Paper market. It can be eliminated with waste water with no contaminant risks.