The final arrangement of sheet pigments such as aluminum powder and pearlescent mica in metal glitter paint cannot be obtained by increasing the rotation speed of the rotating cup, electrostatic voltage or "accelerating volatilization" alone.A more robust control logic is: Establish a suitable atomization window with the rotating cup speed: the droplets are uniform and refined enough, but cannot be excessively dissolved, viscous or dry sprayed before reaching the workpiece. Create a uniform deposition window with a stable but not too strong electric field: the focus is on controlling the trajectory, coating, and film thickness distribution, rather than understanding the electric field as a separate knob that directly “lays” the sheet pigment. Establish a directional locking window with mixed solvents and flash drying conditions: the wet film should retain sufficient flow time so that the sheet pigment tends to be parallel to the substrate; then it should be adhered and locked in time to avoid continued drift, settlement or flow. Therefore, what really needs to be optimized is the continuous process of “atomization — deposition - wet film flow — flash dry locking”, rather than three isolated parameters.
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