It all started in 1945 when Warren R. Schram set out to find a custom rubber stamp store in London, Ontario, Canada. After searching the city without any luck, Warren had an idea. He would try to make his own stamp! It was in that moment that Sterling Marking Products Inc. was formed. Still family owned and operated, Sterling has grown from a one man Rubber Stamp shop to a large company offering a wide variety of Image Graphic Transfer products, technologies and services: