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Airbrushing and humidity

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  • Member since
    January 2008
  • From: Adelaide, South Australia
Posted by somenewguy on Wednesday, July 10, 2013 11:48 AM

Perhaps temperatures and humidity for airbrushing could be covered in a future FSM?! Wink wink.

At the end of the day one's work may be completed but one's education never!
  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Monday, July 1, 2013 9:12 AM

Fast drying lacquers can create a problem even with a water trap. If the dewpoint is really high, then fast drying lacquers actually cool down the surface when the solvent evaporates.  This lowers the temperature below dewpoint, the water condenses on the surface, and a whitish "blush" forms that stays even after the paint dries.  This is when the RH is in the mid to high 90s or dewpoints within a few degrees of temp.  The water is in the air.  Even conventional brushing results in blushing.  I would not use Alclad in very high RH.

Don Stauffer in Minnesota

  • Member since
    February 2003
  • From: Cameron, Texas
Posted by Texgunner on Sunday, June 30, 2013 6:45 PM

JMorgan

When is it too humid to airbrush even with a moisture trap?

When your airbrush starts spitting droplets of water on your fresh paint job.  Yes, even with a trap.  Seriously, that is one of the main reasons that I switched to using CO2 for a propellant.  There is no noise and no moisture.  I used to check the weather report before I'd start a paint job.  I don't anymore.  Someone may soon come along with the correct data regarding percentages for humidity!   Good luck!  Big Smile

Gary


"All you mugs need to get busy building, and post pics!"

  • Member since
    August 2012
Airbrushing and humidity
Posted by JMorgan on Sunday, June 30, 2013 5:48 PM

When is it too humid to airbrush even with a moisture trap?

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