1. When pickling non-standard nuts, it is necessary to control the concentration of the acid solution, otherwise the pickling effect may not be obvious.
2. When quenching non-standard nuts, silicate cleaning agent should be used to clean the impurities attached to the surface, followed by careful rinsing to prevent impurities from remaining on the non-standard nuts and affecting their effectiveness.
3. After tempering treatment, the color of non-standard nuts may change. After soaking the non-standard nuts in ether for a period of time, oily substances are found, indicating that the non-standard nuts have not been treated thoroughly. After the inspection, it will be found that the non-standard nuts are not stacked well enough when heated, and there may be slight oxidation reactions of non-standard nuts in the quenching oil.