Occasionally, a fat edge on a vertical surface will be thick enough for sagging to occur.
The terms fat edge and picture framing often are used interchangeably, but the latter is an obvious choice when the defect really does look like a frame.
This is an expanded version of a "Coatings Clinic" on fat edges and picture framing that previously appeared in JCT CoatingsTech in July 2005 (Vol.
If there is too much flow, the result will be sagging on vertical surfaces and there may be other defects such as craters, dewetting, pull-back from edges, fat edges
, and sinks and bumps.