Powder Contamination (Specks)
low
powder
qa
Foreign particles in powder create pinholes/fisheyes.
Likely Causes
Contamination from environment (dust, debris): Particles fall into the powder hopper.
Using a dirty scoop or container: Introduces foreign matter.
Quick Checks
- Sieve a small batch; inspect under light.
- Compare different lot numbers.
Step-by-Step Fix
Discard contaminated lot; sieve and store sealed — Removes inclusions
Acceptance Criteria
- No specks on 10" solid patch under bright light