April 29, 2007


General Material Problems:


1. Material is soft. It does not set up or sets up slowly:


-Resin is insufficiently mixed. Remember to purge unmixed material from the lines before starting to spray again.


2. Material Foams:


-There is moisture in the resin. Order a molecular sieve and add to it to the resin.


3. Color is Blotchy:


-Inadequate mixing of color in the resin.


4. Color is Translucent:


-Pigment concentration is too low.


5. Color blushes. It lightens when sprayed:


-Pigment concentration is too low.


-Or it’s sprayed too hot or too close to the substrate.


6. Tiny pinholes in surface of coating:


-Moisture in resin.


-Air bubbles in resin (mixed too vigorously).


Note: Be careful not to blend air into the material when the drum is less than half full.