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Old 11-30-2005, 08:48 PM
x711 x711 is offline
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Paint Viscosity Follow Up

In a previous post I had asked about the right Viscosity that paint should
be in order for it to spray correctly, Anyway I had some good responses
from people that were interested in the Thread and wanted to follow up
with some results that I had obtained.

My basic question was to try find a method of checking the viscosity
of the paint, Milo I believe mentioned using a Zahn 2 Cup. Well today
I got one for a real good deal so I could not resist the purchase
"Got to have our toys" lol

Anyway, Some interesting results. I purchased some good Quality single stage
paint from a local supplier and they said they mixed it so that it was ready
to spray "RTS" All I had to do was add the hardener. Anyway the results
of my painting have been pretty ok but I felt that the material was a little
thick or something was wrong with the way it layed down.

On the Data Sheet the viscosity of the material "RTS" according to Valspar shold be in the range of 20 - 22 seconds measured with #2 Zahn cup.

I measured my paint which looked ok to me but found that it gave me a
reading of 55 seconds and thats without the Activator added, Eh something
aint right with this picture. "So the paint is too thick" Come to find out that
the paint really needs to have the consistency that is slightly thicker than
water so that it will spray correctly.

I wanted to post this info as a newbie might run into the same problems as
I did.

FYI: Measuring standard tap water on a No 2 Zahn cup returns 15 seconds
or so. So if the data sheet for your paint states a particular viscosity you
now should have an idea of what it should look like in advance !

comments welcome.

Thanks guys. X
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