LA-CO/Markal announced the celebration of its 70th anniversary in 2004.

The company traces its roots back to 1934, when Dr. Lester Aronberg, a research chemist and steel industry consultant, discovered the B-Paintstik Marker for marking steel.

Today, the company's product offering has broadened to include the Markal® brand of industrial marking products, the LA-CO brand of plumbing chemicals and supplies, and the All-Weather® brand of animal health marking products.