the material additive processes lead fastest to moldings and are therefore the most promising. These also include new and further in RP. Examples of such techniques are laser sintering, laser-generated RP and stereolithography, which enable mold inserts to be made directly from a three-dimensional CAD model of the desired mold. RT also covers metal spraying, which has been used for decades in the mold making.
Master molding techniques like precision and resin casting may be considered as belonging to RT. These process chains become repaid tooling techniques when an RP technique is used to produce the necessary master mold.