Method of producing paint, method of producing magnetic recording medium, method of measuring dispersibility of paint, and stirring apparatus

A stirring apparatus, comprising:

• a stirring unit that stirs paint containing a magnetic powder;
• an impedance measuring unit that measures an impedance of the paint;
• and
• a control unit that controls the stirring unit on a basis of the measured impedance.

The stirring apparatus according to claim 10, further comprising

• a pipe through which the paint stirred by the stirring unit flows, wherein
• the impedance measuring unit measures an impedance of the paint flowing through the pipe. cm 13. The stirring apparatus according to claim 12, further comprising
• a pump that supplies the paint from the stirring unit to the pipe, wherein
• the control unit controls the pump such that a flow rate of the paint flowing through the pipe to be constant.

A method of producing a magnetic recording medium, comprising:

• measuring an impedance of paint containing a magnetic powder;
• controlling stirring of the paint on a basis of the measured impedance;
• and
• forming a magnetic layer using the paint, stirring of the paint being controlled.