A method for manufacturing a monolithic hollow body (1) by means of a casting or injection moulding process, the manufacturing method contemplating the steps of : producing at least one lost ceramic core (2) that reproduces the shape of at least one internal cavity (3) of the hollow body (1), introducing the ceramic core (2) inside a first mould (4) that reproduces in negative the external shape o...

Method for dyeing a substrate prepared by curing a polymerizable composition comprising one monomer containing one episulfide group, said method comprising: - providing a dye solution comprising a dye and a carrier in a solvent, the carrier being chosen from the compounds represented by the following formulae (1) and (2): formula (1) : wherein R1, R2, R3 and R4 are each selected from the group con...