see:Why Was Lead Added to Gasoline). However, this had the negative side effect of releasing massive amounts of lead into the air, which is of course toxic to humans and to the environment in general. So “Regular” gasoline has been phased...
Thus, Crayola crayons were born. By the late 1950s while Binney & Smith was expanding its crayon business, Rosenthal was building up his company, Speedry Chemical Products, which manufactured and marketed his felt-tip pen invention. Rosenthal initially geared his product at the art supplies ...