It is against our Quality Policy as we cannot guarantee how the standards have been stored once leaving our facility. We would recommend making a photocopy/scanning the certificate upon receipt to avoid issues if lost. However reference copies of our Certificates can be downloaded from our Certificate Bank.
The Polydisperse Particle Standards were formally known as the BCR 'Mirror' Standards because they mirrored the size ranges of an official set of spherical reference standards that were being developed for the European Community (Community Bureau of Reference - BCR).
Most particle size reference standards are transparent in nature including glass and latex microspheres However in some optically based particle
Ultra-narrow size distribution glass microspheresOnly a few microns separating many gradesTraceable to international standards - NIST NPLThe widest
Standards for 100mm 4 diameter
Standards for 200mm 8 diameter
Ultra-narrow size distribution glass microspheres. Only a few microns separating many grades. Traceable to international standards - NIST NPLThe widest
Very narrow size distribution Silica beads ranging in size from 1.5 - 10 microns Although this product is not certified we include a table of data.
Very narrow size distribution Silica beads ranging in size from 1 5 - 10 microns Although this product is not certified we include a table of data