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The comments so far relate mainly to the dispersion of Ultramarine pigments into liquids. However there are a number of occasions when it is necessary to combine Ultramarine with other powders. This is normally easy to achieve using the simplest of mixers.

If the Ultramarine is being combined with a powder of low density, it is possible that the pigment agglomerates will not be broken down and specks of undispersed Ultramarine will remain. In this case a powder blender with more shear is necessary. It is often more efficient to make up a concentrate of Ultramarine with the diluent powder in a high shear mixer, before returning it to a simpler mixer for final dilution.

Ultramarine GradesUltramarine is one of the most easily dispersed pigments and in most applications, standard grades are perfectly satisfactory. However Holliday Pigments offers a number of special grades designed to help in specific applications.

Prestige – Easy dispersing pigments for plastics

Holliday Pigments’ Prestige grades are pre-wetted with a low melt temperature resin, which also eliminates dust. By removing the need to first wet the pigment before dispersion can begin, Prestige grades make the process much quicker and easier.

Premier FRX – Extra fine particle size

Standard Ultramarine grades disperse well enough for most applications. However some applications, such as fibres, are particularly sensitive to even the smallest number of oversized particles. For these applications Holliday Pigments manufactures Premier FRX, which is specially processed to remove any such oversize particles

Oleophilic Grades – Increased compatibility

For increased compatibility with oleophilic resins Holliday Pigments offers a range of Ultramarines with an oleophilic surface coating. The coating also provides a lubricating effect during dry blending.

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About Holliday PigmentsHolliday Pigments is a world leading supplier of Ultramarine pigments, which are used in a variety of applications including plastics, coatings, cosmetics, artists’ colours and printing inks. Exporting to over 80 countries, Holliday Pigments has dedicated customer and technical service teams at its factory in France and its commercial office in Singapore.

Holliday Pigments has a proud 125-year history in the manufacture of technical quality Ultramarine and is the only Ultramarine manufacturer in the world to have invested in Flue Gas Desulphurisation technology, reducing sulphur dioxide emissions inherent in the manufacturing process by more than 99.5%

In August 2008, Holliday Pigments joined Rockwood Holdings Inc., becoming an important addition to the Color Pigments and Services Division

Rockwood’s Color Pigments & Services Division is one of the largest worldwide suppliers of colored pigments for construction, coatings, plastics and specialty applications. The Division’s manufacturing sites and customer service centers are located in the United States, United Kingdom, France, Italy, Germany, Australia and China with additional sales offices located in Singapore and Hong Kong. For more information on Rockwood, please visitwww.rockwoodpigments.com

The Rockwood Color Pigments & Services Division is a business unit of Rockwood Holdings Inc., Princeton, N.J., U.S.A. Rockwood Holdings, Inc. is a leading global specialty chemicals and advanced materials company. Rockwood has a worldwide employee base of more than 9,500 people and annual net sales of approximately $3 billion. The company focuses on global niche segments of the specialty chemicals, pigments and additives and advanced materials markets.

For more information on Rockwood,