... Mirror tolerance:+/-0.003mm; Precise Grinding Machine:+/-0.001mm.Mold making procedure: 1. Customer provides 2D drawing, 3D drawing or ... information, to process choosing plastic and mold material, mold making process, and quotation.4. If quotation is ok and ... necessary, we will process preparing material and mold making processing.11. Mold making process, Planer/Shaper, Milling, Grinding, Drilling, ...