Farbabweichungen in der Pulverbeschichtung: Ursachen, Auswirkungen und Lösungen

Colour variations in powder coating: causes, effects and solutions

Colour deviations are differences between the desired and the actual colour of a powder coating. Such deviations can affect the aesthetics and quality of the end product and lead to customer dissatisfaction.

Common causes of colour deviation

• Different batches of powder coating: variations in production can lead to colour differences between different batches.
• Insufficient colour mixing: incomplete or uneven mixing of the powder can lead to colour deviations.
• Fluctuations in the curing parameters: Deviations in temperature or curing time can affect the colour shades.
• Soiling or contamination: foreign particles or residues in the powder coating or on the surface can change the colour.
• Different layer thicknesses: variations in the layer thickness can lead to different colour shades.

How to avoid colour deviations

To prevent colour deviations in powder coating, you should take the following measures:

• Use the same type of powder coating: To minimise colour differences, make sure that only powder coatings from the same production batch are used for a project.
• Careful colour mixing: Make sure that the powder is mixed homogeneously to ensure an even colour.
• Constant curing parameters: Monitor and control temperature and curing time closely to achieve consistent results.
• Clean working environment: Keep the coating area free from dust and contaminants to avoid cross-contamination.
• Consistent coating thickness: Use precise application techniques and high-quality equipment from manufacturers such as Gema, Wagner and Nordson to ensure an even coating thickness.

By implementing these measures, you can effectively prevent colour deviations and achieve a high-quality, even powder coating.