Foundry, glass, filtration and mineral-filler uses have different grading and chemical-purity requirements. Specify the process and acceptance parameters rather than relying on a trade name alone.
Test reports should identify sample source, laboratory method and lot. Packaging, dust control, moisture protection and discharge arrangements are part of the supply specification.
What to include in the inquiry
- Process and end use
- Grading and chemical-analysis limits
- Representative sample and test method
- Dust control, packaging and shipping form