Charles Mazelin (1882-1968) was first trained as the Ecole Nationale Supérieure des Arts Décoratifs in Paris, before moving on to the Ecole Nationale des Beaux-Arts a year later.  This indicates that having first approached the arts with the mindset of a craftsman, he was found to be talented enough to move on to the fine arts.  This is confirmed by the fact that Mazelin, who was trained by Jules Jacquet in etching and by Fernand Cormon in painting, was given the Prix de Rome not once, but twice, both in 1906 and again in 1908.  From Jacquet he clearly learned the marketable skill of etching reproductive intaglio.  This is skill that seems to have served him well.  He is today best remembered for engraving postage stamps for France.