Discoloration or Floating Particles
When the paint comes in contact with floating particles in the painting area, discoloration is a possibility. Discoloration can be caused by other factors/reasons too.
|Vapours or Fumes are present in Painting Area||Check for the presence of ammonia or amine fumes from adhesives or any other sources.|
|Reaction of Aluminium and Steel parts in the spray equipment with Water Borne or Acid Cure||Use stainless steel or solvent resistant plastic parts and liners in spray equipment.|
|The pail lining comes off or the drum is improper||
• Strain the paint through a cheese cloth or a fine filter.
• Ensure no contaminants are present in the filter.
|Presence of Old Nitrocellulose Products||Discard and use fresh material only. Since, it can become amber on aging in the can and react with steel.|
|Chemical Reaction to Surface Treatments||
• Check the pH of the surface.
• If it is in the acidic range, it can react with the alkaline materials.