Specialty Minerals Inc. (SMI) MICROTUFF® 1000 talc technical grade talc products produced by Barretts Minerals Inc., from an extensive deposit of high quality Montana talc ore. SMI's MICROTUFF® 1000 talc (Magnesium Silicate) is manufactured to a median particle size of 1.2 microns with a top size of less than 15 Microns. The material is surface treated with a low level (less than 1%) of a proprietary surface treatment that improves dispersion, of the powder in the resin melt and increases the heat & mechanical properties and color of the final polymer composite. For applications where food contact is needed MICROTUFF® F talc should be used. MICROTUFF® talc products are cost effective, chemically inert, platy, high brightness talcs used primarily for reinforcement, improved weather ability and general improvements in mechanical properties.