Ask the Expert Question-and-Answer Archive

by Ron Joseph

Wetter or Dryer Application

Q: I was pondering over two issues:

1. If all variables are held constant and you have a automotive waterborne paint, which application would be dryer (using an ESTA bell) one at 35000 RPM or one at 55000 RPM? Why?

2. Which application is dryer, electrostatic or conventional ? Why ?

Thanks much for your time and help.

A: If all variables were held constant, I would imagine that the faster rotational speed of the electrostatic bell would break up the paint into finer particles, leading to a drier finish. I have never done this, and therefore it is only a guess.

I would imagine that the same applies to your second a question. Whichever methods produces smaller particles will be expected to accelerate evaporation of the solvent, but I don't have any data to back this up.

Good luck,

Ron Joseph