Common knowledge of coating: what are the precautions for primer construction

Core tips: ① in addition to strictly implementing the requirements of appropriate climatic conditions, the dilution shall be carried out in strict accordance with the construction instructions, and the dilution ratio shall not be increased at will If too much water is added and the viscosity is too low, it is difficult to ensure the dry film thickness and the sealing performance of the paint film to the substrate ② Ensure the reasonable construction recoating time, and generally guarantee the construction interval of 2-6h according to the climatic conditions ③ Do not construct the finish coat after the primer has been constructed for a long time Generally, the formulation design of the primer does not focus on the weatherability If the formulation contains the pigment and filler that are not weatherable, it may be possible to construct the finish coat in time Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: ① in addition to strict implementation of the requirements of the appropriate climate conditions, strictly in accordance with the construction instructions for dilution, dilution ratio can not be increased at will If too much water is added and the viscosity is too low, it is difficult to ensure the dry film thickness and the sealing performance of the paint film to the substrate ② Ensure the reasonable construction recoating time, and generally guarantee the construction interval of 2-6h according to the climatic conditions ③ Do not construct the finish coat after the primer construction for a long time Generally, the formulation design of the primer does not focus on the weather resistance If the formulation contains the pigments and fillers that are not weather resistant, if the finish coat is not constructed in time, some powdering may occur, which will affect the sealing effect of the primer ④ It is necessary to follow the principle of ensuring the adhesion between layers for product matching First, try to avoid painting the oily finish on the water-based primer In general, there will be undercutting phenomenon in this process matching, especially when the solvent type finish roll is applied on the transparent emulsion paint, the undercutting is the most serious, and the primer will be damaged to a large extent Secondly, the two-component primer (e.g epoxy primer) should not be coated with emulsion paint, so as to avoid the phenomenon of top coat falling off ⑤ Generally, the primer does not need to be polished, and it is strictly prohibited to over polish the local primer layer, which will affect the alkali resistant sealing performance of the primer layer ⑥ Brush coating can be used in places where roller coating is not suitable for construction, such as the edge around the window frame or the lower part of the window sill drip line, the intersection of the roof edge and the wall, etc ⑦ The requirement of primer coating is that the paint film shall be even and flat without bubbles and pinholes, and there shall be no missed coating or uneven roller coating In particular, to avoid some parts of the roller coating is not easy to construction and leakage phenomenon Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,