Home / Quality
Petra Silicon’s in-house evaluation covers chemical composition, particle-size distribution and whiteness. Available reports can support customer review by product and batch.
Share your required SiO₂ range and the maximum levels for any impurities your process controls. Ask which elements or oxides are covered by the available report.
List the oxides or impurities your process controls, along with their acceptance limits. Ask which measurements are included in the available report.
Provide a sieve specification or target distribution and the test method your team uses. Where a method reports D10, D50 and D90, these values describe different points on the cumulative size distribution.
Specify whether your acceptance criteria rely on a sieve range, selected cut points or a full distribution. Compare data obtained using the agreed test method.
Where appearance is important, compare whiteness results using the same test method and evaluate the material in a finished trial.
Use a consistent whiteness method when comparing samples, and confirm the appearance in the intended formulation where practical.
Discuss applicable test methods, tolerances and report availability before finalising the specification.
Agree on the test method, tolerance and documentation needed for each check. Record the criteria before a trial so technical and purchasing teams can review the same evidence.
QUALITY DOCUMENTATION
When requesting a report, specify whether it is for initial product selection, a plant trial or a commercial lot. Identify any records your receiving team needs before dispatch.
Ask for the available report for the proposed sample, including chemistry, particle size or whiteness as applicable. Include the tests or limits your team needs to review.
