Complex sentence: Developed an own techniques in the area of etching, such as dry point engraving, magnet etching, punch and flex technique, invented a formula in color mixing which enable him to paint a wide range of unbelievable harmonies of mixing, including old master techniques.
Split into simpler sentences: Developed an own techniques in the area of etching, such as dry point engraving, magnet etching, punch and flex technique. He invented a formula in color mixing which enable him to paint a wide range of unbelievable harmonies of mixing, including old master techniques.