Use water-based paint with low formaldehyde content and no pollution.

Generally acceptable, reflecting natural effects, but will fall off and cause penetrating holes.

 Peeling off the paint on the surface is not acceptable.

+/- 0.2mm acceptable.

Without viscosity is not acceptable;
Mulch of tape's peel off is not acceptable.


 

Colors of plank  should be roughly the same ;     
In order to preserve lumber natural grain,  paint won't be covered too thick, and fully give priority to transparent, and the depth after wiredrawing processing and lumber natural grain will cause the shade of colors, tonal in roughly consistent is acctapble