Poor covering is one of the common disadvantages of the coating film. The phenomenon it produces is "after the coating film is dry, the substrate is not completely covered, and the places with different colors on the substrate can still be observed. There is a kind of see-through There are many reasons for the poor covering of the coating film. From the direct cause, it can be summarized as the content in Table 7-62. (Related instrument: hiding power paper)

The following is a detailed analysis of the various situations of poor cover selection,
(1) Poor hiding caused by poor hiding power of the product is shown in Table 7-63

(2) Poor cover caused by construction See Table 7-64 for poor cover caused by construction.

(3) Poor coverage caused by dry substrate See Table 7-65 for poor coverage caused by dry substrate.

(4) Poor coverage caused by excessive dilution ratio See Table 7-66 for poor coverage caused by excessive dilution ratio.
