Avoiding Picture Frame Effect with Texture Powders: Causes & GEMA Solutions

When using texture powders, the so-called “picture frame effect” often appears – heavy accumulation of coating at the edges instead of a uniform surface. GEMA provides targeted countermeasures.

🔍 What is the Picture Frame Effect?

This effect refers to increased charging and layer thickness at the edges of parts. According to GEMA, it is caused by the nature of texture powders combined with corona guns.

🛠️ GEMA Tips for Elimination

• Retrofit with Super‑Corona® ring: Reduces edge effects through uniform high voltage.
• Activate PCC mode on control units: Automates powder charging and ensures constant output regulation.
• Recalibrate after installation: Voltage and powder quantity must be adjusted after installation.

📈 Key Benefits at a Glance

• Uniform surface texture without edge discoloration
• Less rework—especially on visible areas
• Increased process stability with texture and special powders

📌 Conclusion

With just two targeted actions – the Super‑Corona® ring and PCC mode – the annoying picture frame effect can be eliminated. GEMA explicitly recommends this combination for high-quality finishes.