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Reply by CaptainKlutz

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Posted on Strange behavior in finish when HVLP spraying

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CaptainKlutz

5013 posts in 2774 days


#1 posted 12-09-2019 05:31 AM

The gold standard in setting up your spray process thickness is wet film thickness gauge. Can find them at any decent paint supplier. There are many types to choose from, even disposable ones.
https://www.gardco.com/filmthickness.cfm#wetfilm

The calling card style is popular. My SW and PPG stores will offer me one free occasionally when buying a larger order, if they don’t try asking. It’s essentially their business card with address and phone printed on one side.

Different paints have different optimum wet film thickness. depends on polymer, solvents, fillers, pigments, etc; in the formulation. Generally, when you go over 3-5mils thick with clear wood finishes, it tends to run. Auto base coats usually tolerate less thickness, primers a little thicker; before then run/sag.

Optimum film build is usually part of the use data available from finish supplier.

Cheers!

-- If it wasn't for bad luck, I wouldn't have no luck at all, Doom, despair, agony on me… - Albert King - Born Under a Bad Sign released 1967


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