4.00 x 4.00 width not exceeding M, or according to the purpose of design, using top or เซี้ finished grooved PVC. Using the primer layer of salted lime first. The cement-sand ratio 1:2
Width up to 4.00 x 4.00 m. Or purpose of the design to use potassium or groove PVC. Finished with lime salt primed before class. Cement-sand ratio 1: 2
Size width not exceeding 4.00 x 4.00 m or according to the purpose of the designer to use Xie, or signs of PVC successful styles using lime salted foundation in the previous class. The ratio of cement, sand, 1: 2.