Code 4493 applies to employers engaged in fabric coating or impregnating of fabrics with oils, varnishes, lacquers, plastics or rubbers.  The process of coating is performed by either spreading the product into a coating solvent or by an impregnation method.  The latter is done by placing the fabric into a vacuum tank with solutions of rubber or lacquer and solvents and subjecting them to various high pressures to bond them.  This process is called the “impregnating method.”

The other process of coating a fabric consists of mixing dry chemicals and solvent to form a raw rubber material.  The raw rubber is formed into rubber sheets of various thickness.  The fabric is sprayed with a bonding cement and then the support fabric and rubber sheeting are bonded together in curing lines to form the finished material.  The finished product is usually sent back to the customer in large rolls.  This type of operation is referred to as a coating or laminating process.  Both of the above processes include then putting the products into an oven to cure.  Any rough spots are removed by grinding.

This classification also applies to employers engaged in manufacturing linoleum or linoleum floor tiles.