Photochemical etching is simply a high-quality, fast- turnaround and low-cost alternative for machining flat metal parts. It offers you the precision and accuracy unavailable in other type of milling processes. The conventional process meant stamping which required a matched punch and die. It caused stress, deformation and burrs. The photo etching has not only eliminated these problems, but enabled manufacturers to process parts accurately and much faster than before. It doesn't change the metal composition such as heat or mechanical stress on finished parts.