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Powder Coating is the only technical publication devoted to the Powder Coating industry and other green finishing technologies.
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Publication Date: 11/2013
Pages: 2
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Nick's Niche: Five things you can do to improve your transfer efficiency

This topic has been covered in many forms in the past, by me and by others. However, I thought that a concise checklist approach to what most powder coaters struggle with every day — How to reduce powder overspray/scrap and increase efficiency — could be useful. This way, you can cut this article out of the magazine and laminate it right onto your spray booth for all to see and follow.

Let's start with the scientific theory part of the discussion as the basis for the checklist discussion to follow. Powder particles are attracted to grounded part surfaces by the electrostatic charge imparted on them by the gun; the higher the charge on the powder particle, the better the transfer efficiency. In corona charging systems, the amount of charge on the particle is explained by the formula in Figure 1.

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