Wax that is used for 3D printing and is similar to the one that is used by jewelers for "old-fashioned" casting. Apart from castable photopolymers that are also used for 3D printing, this material is considered to be "100% real wax". In other words, the chance of casting faults is almost zero. High quality manufacturing is carried out by Solidscape or Multi-jet 3D Printers, for instance. 3D printed wax burns out completely at relatively low temperatures and in less time than resin-based materials. It's important to keep in mind that such wax is soluble in ester, aromatic solvent, ether, chloroform and ketone. Overall, 3D printing with castable wax should be used for delicate products that are impossible to make using CNC machines. Otherwise, machining in general is more preferable.
Wax filament is used for FDM 3D printing which makes it much more affordable - generally, it's a plastic that displays wax properties. Though, when used for lost wax casting, the burnout is much cleaner than using plastic filament. This product can also be polished, machined, and carved easier than plastic filaments.
Cover image Mauro Cateb