Using the one component mold making steel 1.2709 Lasergenerating achieves nearly a 100% nonporous microstructure. The average is a density better 99,5%. Compared with rolling mill steel lasergenerated steel has one bid advantage. The quality of the microstructure is always constant and reproducible! The picture shows a grinded und etched surface. The black points are no pores! During the grinding oxides were broken out of the microstructure.