| 摘要 |
<p>Disclosed is that one coating system of aqueous intermediate-coating paint (20) can employ a plurality of colors of aqueous intermediate-coating paints and easily recycle them without color mixing problems. The method comprises spray-coating an article (50) with aqueous paint in a coating booth, recovering over-spray paint that has not applied on the article in a booth circulating water bath (5), carrying out spray-coating for a certain period of time followed by sending the content of the booth circulating water bath to a concentration tank (7) after finishing a certain term for coating, separating the content with a ultrafiltration device (9) into a concentrated paint having a desired concentration and a filtrate, storing the concentrated paint in a recovering tank (12) for re-using on desire, the spray-coating being conducted using at least two different achromatic color intermediate-coating paints having different lightness, the over-spray paint being recovered mixing together the different achromatic color intermediate-coating paints and subjected to concentration to form a concentrated paint, and the concentrated paint being either re-used as one of achromatic color intermediate-coating paints as it is, or being subjected to lightness adjustment to lower lightness and re-used as one of achromatic color intermediate-coating paints having lower lightness. <IMAGE></p> |
