Common knowledge of coating: construction steps and precautions of colorful coating for exterior wall

Core tip: the construction technology of multi-color coating is a knowledge, which has certain requirements for the selection of spraying machines and tools, spraying technology, base treatment, and rational use of coating The following describes the construction steps of multi-color coating and the problems that should be paid attention to in the construction process 1 During the construction of multi-color coating, the surface coating shall be sprayed under the suitable climatic conditions: temperature above 20 ℃, relative humidity below 85%; temperature above 10 ℃, relative humidity below 80%; temperature above 5 ℃, relative humidity below 60% The climate conditions that are not suitable for construction are: rainy and high humidity climate or the temperature is more than 5 ℃ 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? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: the construction technology of multi-color paint is a knowledge There are certain requirements for the selection of spraying machines and tools, spraying technology, base treatment, and rational use of paint The following describes the construction steps of multi-color coating and the problems that should be paid attention to in the construction process 1 During the construction of multi-color coating, the surface coating shall be sprayed under the suitable climatic conditions: temperature above 20 ℃, relative humidity below 85%; temperature above 10 ℃, relative humidity below 80%; temperature above 5 ℃, relative humidity below 60% Climate conditions not suitable for construction: rainy and high humidity climate or temperature below 5 ℃ 2 Preparation of painting machines and tools The colorful spray gun imported from Japan (the best spray gun is Iwata 871 and Fenghe pz-25), with a diameter of 2.5mm The pressure of air compressor is 0.4 ~ 0.8MPa, and the exhaust volume is more than 0.25m3/min In order to move and use conveniently, the single-phase (220V) portable model can be used Taiwan, Italy, the United States and other imported light products are the most suitable In addition, roller, paint brush, putty scraper, material spoon, labor protection articles, etc shall be prepared 3 Treatment of construction base materials Remove the floating ash, loose matter, oil stain and the raised part The alkali returning wall surface shall be washed with 5% dilute hydrochloric acid solution and then washed with clear water, and dried naturally for more than 72h For the new wall (cement mortar, pocketknife, paper reinforced lime plaster), one week in summer, more than 10 days in winter (moisture content 10%, pH value below 9.5) On fiberboard and wood board, the nail head shall be treated with antirust treatment, and the board joint shall be pasted with thin Dacron inclined strip cloth The concave and convex surface of the old wall shall be filled with putty, and the surface of the old paint film shall be polished with 0 × 1 × sandcloth 4 Bottom and middle coating construction Roller coating can be used The corners that cannot be roller coated must be repaired with paint brush without omission The primer shall be applied for 4H before the intermediate coating 5 Colorful coating construction The coating can only be rolled for 4H First, before the coating packaging barrel is unsealed, shake it or roll it according to the circumference, then open the cover, and mix it evenly with a wooden stick Check the spraying machine, turn on the air compressor to inflate, and adjust the air pressure to 0.35-0.4mpa, Connect the colorful spray gun with the rubber pipe, carry out the empty gun test spraying, and observe that the pressure is within the effective pressure range (0.25-0.35mpa); after the spray gun is equipped with the colorful coating, try spraying on the test board, adjust the coating output and air output to a suitable level, and then move it to the construction base surface for spraying The spray gun is vertically aligned with the coated surface, keeping a distance of 30-40cm from the wall, and painting is conducted in a right angle intersection from up to down, left and right, and moving The movement shall be stable, and it is not allowed to stop, move or jump the road to avoid stacking, sagging, uneven and other defects; at the corner of spraying wall and corner, cover the corner of one wall with a shelter for 10 ~ 20cm, and then cover the other side after spraying, so as to avoid the phenomenon of too dense pattern at the corner; control the spraying amount, which will cause sagging, blurred pattern and too little use The pattern is granular, the surface is rough and the coating performance index is low Therefore, the amount of coating should be 3-5m2 / kg 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,