Pattern welded blade. Pattern welding involves taking multiple kinds of metal bars, heating and twisting them together and then forging them into a blade that has both the hard, cutting quality of the one metal and the soft, flexible quality of the other.
design-is-fine: Henri Matisse sending letters to André Rouveyre, 1943. The correspondence stands out in its extent and frequency – for long periods they wrote to each other daily, sometimes several times a day – and in its abundance of drawings, sketches and decorated envelopes by Matisse. More: henri-matisse.net