# Bronze Casts: Lifetime, Posthumous, Surmoulage > Two casting methods, three kinds of cast and one French decree decide what a bronze is worth. The edition number and the cast date carry more price than the modelling. > The Study - 2026-08-02 > Canonical HTML: https://iconotheca.com/study/bronze-casts-lifetime-posthumous-surmoulage/ ## Key points - Indirect lost wax reproduces a wax shell about 3 mm thick that the sculptor can rework; French sand casting takes the mould straight off a cut-up model and needs far more chasing. - A surmoulage is moulded from a finished bronze, so it comes out smaller than its parent and softer in surface detail. - French law caps an original edition at twelve: eight numbered 1/8 to 8/8 and four artist's proofs I/IV to IV/IV, with anything further marked as a reproduction. - Guy Hain recast from genuine Rudier moulds and stamped them Alexis Rudier to imply lifetime casts; an expert estimated over 6,000 copies, only about a third traced. ## Two ways to get bronze out of a model, and they leave different objects ## A cast is a generation, and each generation loses something measurable ## French law wrote the edition, and the market inherited it ## The market prices the cast date, and the reporting rarely says which price it means ## Guy Hain proved that the mould's provenance is the object's provenance With a painting the object and the act of making it are the same event. With a bronze they are separated by a mould, a foundry and often a death, and value tracks that separation more closely than it tracks the modelling. The model gives the form; the mould's history gives the generation; the law gives the number; the foundry gives the surface. Anyone buying a bronze is buying a specific pour on a specific date from a specific mould, and the only defensible version of that transaction is one where all four of those facts are documented before the money moves. ## Questions **Is a posthumous Musee Rodin cast an original?** Under French law, yes, provided it falls within the edition of twelve and was cast under the museum's authority, which derives from Rodin's 1916 bequest and the decree of 5 September 1978. The market nonetheless pays a large multiple for lifetime casts, so 'original' in the legal sense and 'lifetime' in the commercial sense have to be kept apart in any valuation. **How do you detect a surmoulage?** Measure it against documented dimensions for that model at that size, since an aftercast is smaller than its parent because metal shrinks as it cools, and examine the crispness of edges and tooling, which moulding from a finished bronze softens. Absent foundry marks and numbers are a further indicator, though a skilled aftercast can be superb in quality, so finish alone proves nothing. **Does an artist's proof numbered in Roman numerals indicate a superior cast?** No. Under the French numbering scheme established in 1981 the four Roman-numbered proofs are part of the same edition of twelve and were designated for cultural institutions rather than for public sale. Any premium attached to them is a market convention, not a statement about the casting. **Why do reported sculpture prices need the same hammer-versus-premium treatment as paintings?** Because the headline figures published for major bronzes are normally premium-inclusive totals, while the hammer price, which is what the market actually bid, goes unreported. Where a result is quoted in one currency and converted into another, the conversion is derived and date-dependent, and the sale currency is the fact of record. ## Sources - [1] Wikipedia, 'Lost-wax casting': direct and indirect methods, 3 mm wax shell, chasing, spruing, ceramic shell investment, burnout, pour at about 1200 C, metal chasing. Tertiary source; replace with foundry technical literature. - [2] Wikipedia, 'Sand casting': green sand, cope and drag, cores, surface finish, and comparison with investment casting on detail and cost. Tertiary source. - [3] Musee Rodin, 'Bronze sand casting': packing the mould in sand, replacing the core, casting directly, cutting the model, additional chasing, the Thinker cast in one pour. - [4] Musee Rodin, 'Original bronze casts': limit of twelve bronzes per original work, validation by two committees of French and foreign experts, ethical charter, one cast retained for the national collections. - [5] Iris and B. Gerald Cantor Foundation, 'Laws that Govern the Casting of Rodin's Work': 1916 bequest, 1956 limit of twelve, 1968 date inscription, 1981 numbering of 1/8-8/8 and I/IV-IV/IV. - [6] Gilles Perrault, 'The regulations governing bronze sculptures': decree 81-255 of 3 March 1981, Article R.122-3 CPI, compulsory numbering from 1 January 1968, the marking 'Reproduction', the one-third rule for enlargements and reductions. - [7] Daumier Register, 'Bronze surmoulage (copy)': how aftercasts are produced and detected, dimensional shrinkage, removal of foundry marks, and the quality of Guy Hain's Daumier busts. - [8] Wikipedia, 'Guy Hain': the Rudier moulds, the Alexis Rudier signature, arrest January 1992 and seizure of about twenty tons, trial 17 January 1996, four-year sentence June 1997, rearrest 2002, estimate of over 6,000 copies. Tertiary source; replace with the French court record. - [9] Judd Tully, 'Appraising Rodin': David Norman on lifetime casts, the 1920s patinas, and the Sotheby's results of May 2016 and February 2016. Prices as reported; the source does not distinguish hammer from premium-inclusive total. - [10] Wikipedia, 'Little Dancer of Fourteen Years': 1881 pigmented beeswax over armature, Hebrard casting 1920-1936, Valsuani to the mid-1970s, sixty-nine surviving waxes, at least twenty-eight bronzes, Sotheby's sale of 3 February 2009 at a reported GBP 13,257,250. Tertiary source.