Gloss & Appearance

Sheen

The amount of unscattered light reflected from the surface of a coating is its gloss level.  An incident angle of 60 degrees is often used, although 20 and 80 degree measurements have limited use too.  Gloss level is often described as a percentage, however Gloss Units (GU) is the more accurate description.

Too Much Gloss

Gloss is higher than the standard

  • Potential Cause

    Under cured films will exhibit variability in their gloss

  • Solution

    Modify cure conditions by increasing temperature and/or oven dwell time.

  • Potential Cause

    The gloss of certain coating systems may vary with cure conditions

  • Solution

    Contact us for information and recommendations

Gloss Too Low

Gloss is lower than the standard

  • Potential Cause

    Contamination with an incompatible powder

  • Solution

    Clean all equipment, including gun, booth and recovery system.  Re-charge with virgin powder.

  • Potential Cause

    The gloss of certain coating systems may vary with cure conditions.

  • Solution

    Adjust air/metal temperatures.  Adjust line speed.  Contact us for information and recommendations.

  • Potential Cause

    Haziness caused by fumes trapped in oven

  • Solution

    Ensure adequate air flow in the powder oven.

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