The invention provides an
etching process for stainless steel, which comprises a plurality of steps: a. pre-
processing, used to do
surface cleaning operations like cleaning and deoiling of the initial stainless steel workpiece; b.
coating, in which the surface of the stainless steel is applied with photosensitive glue, and the operations of
exposure, development and hardening are conducted; c.
etching, in which stainless steel
etching solution is used to erode the exposed
metal part of the stainless steel workpiece; wherein, the stainless steel etching solution is mainly composed of:
ferric trichloride 400 to 600 g / L,
hydrochloric acid 2 to 5 g / L,
ammonium bifluoride 1 to 2 g / L, thioureas 2.5 to 5 g / L, etching
promoter 1 to 5 g / L and regenerator 2 to 5 g / L; d. demoulding, when the etching is done to a certain extent, the remaining glue on the surface of the workpiece can be removed by means of dissolving liquid, and thus the intended product can be obtained after cleaning. The invention has the advantages of good etching speed, high precision, regenerating capacity of the etching solution, simple manufacturing process and broad market prospect.