Powder should come marked with the correct curing temperature. This polyester powder from Electrostatic Magic needed 10 minutes at 180 degrees C and the bag was labelled with that information. The oven was preheated. My first two samples were a sheet metal framing bracket and a mild steel ball handle, still attached to its stock material.I found that the sheet metal sample quickly attained the oven temperature, but the heavier diameter 20mm piece took several additional minutes, photos 15 & 16. Timing starts when the coating is at 180 degrees C. This is also indicated by the powder acquiring a granulated look at about 110 degrees C as it starts to fuse.
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