Plan a trial for your application
Mineral fillers in plastics
In the same polymer, compare dispersion, surface gloss and impact resistance.
Rubber filling
Compare mixing torque, cure curve and mechanical properties.
Purchase specifications and incoming inspection
Use these properties to compare grades within the product family. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. Burgess Pigment · Technical information for a specified kaolin grade ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Particle size distribution | µm | Confirm against the offered grade and purchase specification | Report D50, the coarse end of the distribution and the dispersion conditions for measurement. |
| Oil absorption | g/100 g | Confirm against the offered grade and purchase specification | Compare using the same method and investigate differences in porosity or processing. |
| Whiteness or brightness | Specified scale | Confirm against the offered grade and purchase specification | State the equipment used and whether the material is calcined. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Specify treatment process, pack net weight and liner. Verify unloading equipment for bulk delivery.
Storage and handling
Retain the lot ID and reference colour panel. Recheck dispersion after moisture-related agglomeration.
Sample and order lead times
Specify colour code, surface treatment or filler grade and whether a single lot is required. Confirm trial quantity, MOQ, retention across lots and arrival.
Questions from the plant
Can calcined kaolin directly replace water-washed kaolin by weight?
Compare oil absorption, bulk density and the coarse particle fraction, then test mechanical properties of the part.
Why could a whiter powder give a darker finished part?
Check dispersion under shear, resin colour and process temperature in the same formulation.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Particle size distribution, Oil absorption, Whiteness or brightness.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.