Obligingly, Franklin went to great pains to show the men everything he knew himself. He did considerably more than he was paid to do. When types wore out, instead of sending an order to England for more, he devised a copper mold to cast new type, the first time this had been done in America. He made their ink, and he started a sideline of engraving. All the techniques he had learned from the London experts, he now put to use.