底漆、面漆、乳胶漆的不同作用 Different effects of primer, topcoat and latex paint

According to the function, the coating is generally divided into 4 types (from top to bottom): closed, primer, paint, paint.

Closed: more used for wood base material, closed isolation effect.

Primer: fill and increase the thickness and other functions such as antirust. If it is a latex paint, it has the effect of anti - alkali and anti - mould.

Medium lacquer: increase the thickness, more common in floor lacquer, some other special functions, such as anti static.

Topcoat: decoration and beauty, surface decoration and wear resistance.

Latex primer and topcoat, the primer has the effect of anti alkali and plasticizing. But it is not necessary to brush primers. This is mainly from an economic point of view. Primers are generally used for middle and high grade topcoat, and if you choose low-grade topcoat, there is no need to brush primers. The price of the primer is more expensive than the finish. Is it necessary to brush the primer? Even if it is brushed, it is not good to brush the primer because the finish is too poor.

If you choose middle and low grade paint, it is suggested not to brush the primer, the brush is the white brush, the white flower is wrong, the 2-3 times the finish is enough.