How to Perform Particle Size Testing in Glass
Mar 27, 2026
Performing particle size testing correctly ensures accurate results and consistent glass quality. Follow these steps to conduct reliable testing and avoid common mistakes that disrupt production.
Start with sample preparation. Take a small representative sample of glass particles or additives avoid taking only surface particles as they may not reflect the full batch. For fine powders mix the sample with a dispersant like water or alcohol to prevent clumping clumps skew size readings.
Choose the right testing method based on particle size. For particles 10-100 microns use laser diffraction it's fast and accurate. For particles above 100 microns sieve analysis works best. Ensure the method matches your glass application coarse particles for grinding need sieve tests fine powders for casting need laser diffraction.
Calibrate equipment before testing. Use a standard reference material with known particle sizes to check accuracy. We calibrate our laser diffraction tool weekly and sieve sets monthly uncalibrated equipment gives false readings leading to wrong adjustments.
Run the test properly. For laser diffraction place the prepared sample in the test chamber and start the machine it measures light scattering to calculate size distribution. For sieve analysis stack sieves from largest to smallest place the sample on top and shake for 10-15 minutes then weigh particles retained on each sieve.
Record and analyze results. Note the particle size distribution including average size and range. Compare results to your target specifications if particles are too large adjust grinding parameters if too fine add a anti-clumping agent to prevent clumping.
Validate results with a second test. Run the same sample again to ensure consistency if readings differ check sample preparation or equipment calibration. Consistent results mean your test is reliable.
Clean equipment after each use. Residue from previous samples can contaminate new tests. Wipe down laser diffraction chambers and clean sieves thoroughly to maintain accuracy for future tests.
