Coating technology: Construction Technology of crack paint

Core tip: the construction of crack paint needs some skills The size and evenness of crack are related to the viscosity of paint mixing, air volume, oil volume, thickness, etc If large crack effect is required, the primer film thickness shall be thicker, and the crack paint shall be sprayed 2-3 times more, and the air volume shall not be too large; if small crack effect is required, the primer shall not be too thick, and the crack paint shall be sprayed thinner, and the air volume may be slightly larger But the uniformity of spraying should be kept all the time to obtain uniform crack effect Many people will say that the construction of crack paint is spraying This construction method has a long history, but this construction method Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? 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required, the primer shall not be too thick, and the crack paint shall be sprayed thinner, and the air volume may be slightly larger But the uniformity of spraying should be kept all the time to obtain uniform crack effect When many people talk about the construction of crack paint, they will say it is spraying This construction method has a long history, but the loss of this construction method is relatively large Once the construction personnel's technique is not perfect, it is easy to appear uneven phenomenon Only suitable for small area spraying construction is limited in many aspects In fact, crack paint can be brushed with a brush, but for hair There are certain requirements for the brush It is better to use the brush made of pig hair The biggest advantage of this construction method is material saving and less impact on the construction environment The decisive point is that the crack will not crack into a network, and the crack constructed with the brush will crack like a bamboo joint Before the construction of crack paint, the primer is generally constructed first The primer can be matched with the crack primer produced by the same factory or colored primer can be made with aluminum powder, pearlescent powder, gold powder, etc Generally speaking, the greater the color contrast between the primer and the finish, the stronger the stereoscopic sense and the better the effect But if it is applied on polystyrene plastic (PS), it can be directly sprayed with crack paint without priming a Matching crack primer for construction: the matching crack primer is the same as the crack paint No curing agent is needed when matching the paint The construction viscosity is adjusted with a proper amount of special crack water After the adjusted paint is fully mixed, filter it with a 100-200 mesh filter screen, and then the construction can be carried out The paint liquid is now used Once it is prepared, try to use it up to 4 hours within 2 hours After the paint is opened, it must be sealed immediately to avoid volatilization, moisture absorption deterioration and affecting the use effect During the construction, 1-2 layers of nitro sealing primer (dedebo) shall be applied at the base course, and then 2-3 layers of nitro white (or colored) primer shall be applied until the base course reaches the full effect After the base course is dry, it shall be polished and dedusted, and then 1-2 layers of supporting crack primer can be applied During the construction, it shall be evenly sprayed, and after it is dry, it shall be polished with 600 meshes of sandpaper to remove the dust The film coating of crack primer shall have certain fullness (generally spraying a half cross) If the film is too thin, it will affect the adhesion and strength b Construction aluminum powder, pearlescent powder, gold powder and other colored primers: aluminum powder, pearlescent powder, gold powder and so on are mixed with proper amount of Tianna water During the construction, 2-3 layers of white nitro hand broom paint are applied at the base to achieve the full effect After the paint is dry, it can be polished and cleaned, and then evenly spray 1-2 layers of mixed aluminum powder, pearlescent powder, gold powder and other paints After the paint is dry, it can be cleaned without grinding c Construction crack paint: evenly spray one layer of the prepared crack paint on the base surface which has been sprayed with primer for about 30-50 minutes Due to the shrinkage of shrinkage agent, the crack effect can be produced by itself Under the beautiful crack, the color of the base color paint will be exposed If the crack paint matches with the primer, a good pattern and color can be obtained When spraying the crack finish, the construction must be carried out after the primer is dry (generally 25 ℃, more than 6 hours), otherwise the crack will be affected Finally, semi matte, matte clear finish or two-component PU varnish shall be used to cover the crack paint surface Before large-scale construction, the sample must be sprayed on the small sample plate which has been sprayed with primer According to the effect of crack size, the construction viscosity of crack top coat and the thickness of paint film shall be selected, and the shape, air pressure and paint output (setting) of spray gun shall be adjusted When the viscosity of crack finish is large and the film is thick, the crack speed is slow and the crack texture is large; otherwise, the crack speed is fast and the crack texture is small The spraying of crack top coat must be uniform, otherwise the effect of uneven crack size will be produced If the crack effect is not good after construction, the primer can be repainted directly on the top coat (before the varnish covering process), and the repainting method is the same as before Construction skills the construction of crack paint needs certain skills The size and evenness of cracks are related to the viscosity of paint mixing, air volume, oil volume and thickness of spraying The construction viscosity of paint spraying with the same crack effect shall be unified, and the color proportion of paint mixing with the same crack effect shall be unified The air pressure of the air compressor shall be kept the same during spraying, not large or small The diameter of spray gun shall be 1.5-2.0mm, and the oil outlet shall be smooth The gun speed and interval distance should be the same, and the exhaust and oil output should be well controlled 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,