MY BOARDSERVER
 Subject: What is Flashing?
 
Author: michael burgin
Date:   7/13/2011 8:34 pm 
Flashing is an uneven appearance on the topcoat of paint.

Paint is a suspension of polymer particles in water. After paint is applied to a surface, the water gradually evaporates, leaving the polymer solids to coalesce (join physically) and bond (join chemically) with each other. After coalescing and bonding, the solids lie flat to create a uniform film on the surface. Flashing is the failure of the paint to coalesce and bond; the result is an uneven sheen on the surface of the paint. Flashing originally referred to paint flashing—evaporating too quickly—off the surface, creating an uneven sheen on the paint coating. Flashing now refers generally to an uneven sheen on the paint coating.



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Cause 1:
Hot surface
If the surface is too hot, the paint will flash (evaporate too quickly) off the surface when it's applied, resulting in an uneven sheen.

Cause 2:
Cold surface
If the surface is too cold, the paint may not properly coalesce and bond to create a uniform film. Cold temperatures interfere with paint's ability to coalesce and bond; the polymer particles don't have sufficient energy to move together. As a result, the paint coating won’t have the desired integrity, and it will be prone to flashing.

Cause 3:
Inadequate thickness
If the paint coating is applied too thin, the polymer particles in the paint won't be able to properly coalesce and bond. There won't be sufficient polymer particles to form a cohesive paint film. As a result, the paint coating won’t have the desired integrity, and it will be prone to flashing.

As seen on www.toolbelt.buildiq.com

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 Topics Author  Date      
 What is Flashing?    
michael burgin 7/13/2011 8:34 pm 
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