25. March 2021 Rapid casting as a low-cost alternative to metal printing: How it works! One layer ahead with Binder Jetting 3D printing: automotive supplier GRATZ Engineering GmbH shows how it's done By integrating sand 3D printing into its technical business units, GRATZ Engineering GmbH has given its prototype production a boost in terms of cost-effectiveness and production speed. The automotive supplier from the northeast of Baden-Württemberg in Germany recognized the enormous potential of 3D printing back in the nineties, when it was still a very young technology. Since then, GRATZ has relied on fast metal printing and low-cost 3D printing of sand casting molds.