materjalikihi toorikult kohteemaldus toorikut kahelt poolt söövitades; väljalõigatavaks tooteks on tooriku kaitsekihiga kaitstud osad (vt keemiline töötlus), nontraditional machining process for producing machined features on thin plates and foil material using a suitable etching solution, which were generally produced by mechanical blanking process (see: chemical machining)