The subject of the project is the research and development of additive processing process of tool steels for efficient production of high-pressure die casting of zinc alloys. The aim of the developed solution will be to achieve a significant reduction in the cost of production of high-pressure zinc casting molds by the Selective Laser Melting (SLM) technology. The output of the project will be a prototype of a commercially fully usable additively manufactured die-casting mold for zinc alloys with conformal cooling and a functional mold sample for zinc die-casting.