首页即时动态美刷坚持“一底两面”，省心还是贵？

美刷坚持“一底两面”，省心还是贵？

来源：家居百科时间：2026年11月12日 18:24

Understanding the Importance of Primer in Painting Understanding the Importance of Primer in Painting

In the world of brush painting, there's a rule that is never compromised: one base and two sides are the bottom line, not an option. It's common for homeowners to ask, "Can I skip priming? It saves a step and I can save some money; it doesn't look that different, anyway." The difference is not immediately visible on the day of painting, but rather after two years during a humid day or a sunny afternoon. Today, let's discuss this seemingly "extra" layer of primer and what it actually protects?

One base and two sides, the invisible foundation of the home. One base and two sides mean one coat of primer and two coats of finish paint. This is the golden standard for latex paint application. Many wall problems, such as efflorescence, blooming, peeling, and chalking, actually stem from the base, not the surface. Cement walls are alkaline, and if you apply finish paint directly without sealing, alkaline substances will slowly渗透 out and corrode the finish paint. The role of primer is like a sealing wall, locking the alkaline in the base, while also filling the capillary pores on the wall surface, allowing the finish paint to adhere evenly and appear more vibrant. Therefore, primer is not just a dispensable "安慰剂," but an insurance policy for the lifespan of the wall.

For renovations of old houses, this layer of primer is indispensable. The walls of old houses have often been used for tens or even twenty years, and the base condition is much more complex than that of new houses: old plaster may have become powdery and loose, the wall may have residual oil stains, mildew spots, or may have been repeatedly repaired with uneven colors. If new paint is applied directly to such walls, the new paint will not adhere well to the old base, and it will peel off soon. The role of primer here is first to "grasp" the loose old base again, providing a reliable foundation for the new finish paint; secondly, to seal the old wall's residual stains and alkaline substances to prevent them from polluting the new paint in the future. The worst thing is that the "surface is new but the inside is still loose." One base and two sides are to give the old wall a new foundation.

For upgraded fine work, the two layers of primer that are not seen. One base and two sides are the foundation, but for Mei Shua Painting, when dealing with homeowners who have a strong obsession with texture or houses with complex base conditions, especially old house renovations, we will actively recommend upgrading to two layers of primer. These two primers have different functions:

The penetrating primer is responsible for reinforcing the foundation. The old plaster in old houses has often become crumbly, and the penetrating primer can penetrate into the capillary pores like water, re-grasp the loose particles, and make the entire base solid. The new paint will not float on the surface. This layer is often matched with Kewei B2093 interior anti-algae primer, which has excellent penetration and sealing properties, effectively balancing the water absorption rate of the base material and preventing the seepage of alkaline substances that cause chalking and mildew.

The covering anti-algae paint is responsible for covering and anti-algae. On the basis of the penetration layer, it further seals the wall and strengthens the anti-algae barrier, while covering the yellowing, water stains, and repair color differences commonly found in old walls, making the finish paint color purer and more even. This layer is often used with Kewei B2092 interior anti-algae paint, which has strong covering power and better coloring, covering the base color differences and mixed colors more cleanly, making the finish paint color more full. For walls in old houses with complex bases, many old stains, and obvious color differences, using B2092 as the second covering layer will have a better effect.

The wall is the largest "furniture" in the home and is often overlooked. One base and two sides are the bottom line, and two base and two sides are sincerity. Mei Shua Painting is willing to put effort into the unseen places because renovating an old house is not just painting a wall, but providing the foundation for many years of living.