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ABSTRACT
Coloring supports allow for the modification of certain characteristics, in order to meet aesthetic, identification and security needs for instance. Two types of coloring matters are used: pigments and colorants. Their origin and preparation mode differ; Contrarily to colorants which are absorbed by the support and unite chemically to the molecules they color, pigments attach only to the surface of the object. This article details the properties and characteristics (mechanical, chemical, optical, etc.) of these two families of additives whilst distinguishing between pigments of organic origin and pigments of mineral origin.
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Read the articleAUTHOR
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Daniel WYART: Engineer from the Conservatoire National des Arts et Métiers - Former Sales and Marketing Director - BASF Coatings
INTRODUCTION
By their very nature, polymers have little or no color. Coloration helps to highlight an object. It can also serve as a marker (to differentiate the density of flexible polyurethane foams, for example). Coloring can also be used to improve signage (roadworks, for example), and can also provide camouflage.
It must therefore satisfy a wide range of requirements:
aesthetics ;
techniques ;
safety ;
Locating ;
camouflage.
Coloration influences certain material characteristics (chemical resistance, light fastness, structural modification, etc.).
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Dyes and pigments
Name
Bibliography
Events
Luxe Pack – 10/20/2010 in Monaco
K 2010 – 10/27 to 11/3/2010 in Düsseldorf
Standards and norms
- Testing of pigments (Part 1 et Part 2). - DIN 53235 -
- Testing in plasticised PVC – Composition and preparation of basic mixture. - DIN 53775 -
- Colouring materials ; classification according to coloristic and chemical aspects. - DIN 55944 -
- Plastics – Methods of Exposure to laboratory light sources. - DIN 53387 -
- Printing, printing inks and substrates – Assessment of light fastness...
Regulations
Circular N° 176 du 2/12/1959 relative aux pigments et colorants des matières plastiques et emballages.
Council Directive 91/338/EEC of June 18, 1991 amending for the tenth time Directive 76/769/EEC on the approximation of the laws, regulations and administrative provisions of the Member States relating to restrictions on the marketing and use of certain dangerous substances and preparations....
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BASF France
BASF Color Solutions France SAS
Bodo Möller Chemie France SAS
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