Roofing Granules

ID: 1414 ~ Source: Minnesota Historical Society

This file appears in: Abrasives Products & Manufacturing

By 1947, 3M was producing enough
roofing granules to cover 1,200,000 houses.

This file appears in: Abrasives Products & Manufacturing

Abrasives Products & Manufacturing

By Marjorie Pearson, Summit Envirosolutions, Inc.

3M INNOVATIONS IN ABRASIVES PRODUCTS Abrasives: The Sandpaper Story 3M began manufacturing a single product, abrasive sandpaper, in 1905 at a plant in Duluth. Sandpaper was still the only product when…