| Titre : |
Meeting the colour delivery challenge |
| Type de document : |
texte imprimé |
| Auteurs : |
J. A. Graystone, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 516-523 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
Peinture Fabrication Pigment Dispersion Formulation 'Propriété optique' Couleur |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Control of colour has always represented a challenge to the industry, and one which has often only been met by a strategy of post adjustment usually involving several test cycles. New challenges have arisen from both environmental legislative pressures and the relentless quest for quality, efficiency and operational excellence. The desire for 'Right First Time'(RTF) manufacture is an example of the latter, which is at variance with the post adjustment philosophy.One response has been a greater use of blending and tinting systems using pigment concentrates, not only at the point of sale, but also for factory manufacture.This does not eliminate the need for adjustment of the concentrates themselves but it removes this step from the critical path.Environmental pressures have manifested themselves in changes to pigment manufacturing processes with some grades disappearing altogether and others needing reformulation. Water-borne and high solids technologies present new challenges to achieve pigment dispersionwith the right rheological balance and this has resulted in new generations of polymeric pigment dispersants. On the equipment side the need for emission control has resulted in closed loop mills, at the same time the available energy intensity has increased to allow faster and in some cases more complete processing. recirculatory rather than batch mode processing has give more scope for instrumental process control. Exploiting these opportunities is enhanced by an understanding of the underlying physical and chemical processes and the accuracy with which they can be measured. |
| Note de contenu : |
- COLOUR DELIVERY
- ATTRIBUTES OF COLOUR AND COLOUR THEORY : Hue and strength
- FORMULATION ASPECTS OF PIGMENT DISPERSION : Pigment selection - Dispersant selection - Requirements for stable pigment dispersion
- MANUFACTURING PHILOSOPHY AND TEST CAPABILITY : Test capability - Adjustment strategy
- CONTROLLING THE PRODUCTION PROCESS : Millbase design - Control options - Scale up
- DEVELOPMENTS IN PROCESSING EQUIPMENT |
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in SURFACE COATINGS INTERNATIONAL > Vol. 80, N° 11 (11/1997) . - p. 516-523
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Meeting the colour delivery challenge in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 11 (11/1997)
