Michel BASSOMPIERRE uses the “lost wax” technique for each of his bronzes pattines. There are “originals” according to the Code of deontology of Fonderies of Art: limitation about the number of prints as 12 exemplaries, 8 are numbered in Arabic numerals 1/8, 2/8, etc. and 4 are called "Artist's proofs" numbered in roman numerals EA I / IV, EA II / IV, etc.