Does the etching fluid need to be replaced in the etching process?

Q: does the etching fluid need to be replaced in the etching process?

A: etching solution in use for a period of time after the need to regenerate or replace, otherwise it will affect the processing effect, the main reason is that the solution in use for a period of time, the etching ability will be weakened, at this time can be used to regenerate the method is suitable for also low iron ions into high iron ions, improve the chemical reaction capacity.A relatively simple method of regeneration is to regenerate by means of clean air at a temperature of 30℃.If time is too long, etching liquid used in solution or other impurity aluminum ions content too high, can't use the regeneration methods, in order to guarantee the effect of etching processing, etching liquid needs to be replaced, to ensure that the reaction, recommend replacing part of the solution, adding a new ferric chloride or other solution, the concrete adding quantity can be adjusted based on the analysis, also can be adjusted based on experience judgement.