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First of all, it is very important to choose good quality putty, which is an important prerequisite for good putty.
In addition, different putties should be used for internal and external walls.
Understand the ratio of putty and water, and mix the putty with uniform quality and excellent quality.
Put the right amount of water in the bucket according to the ratio, then pour in the right amount of putty powder, install the electric drill on the mixing head, power on and stir until it is sauce-like;before scraping, use a broom and putty knife to clean the wall Clean, it is very important to clean the base layer of the wall.
If there are seams or missing corners, we must use plaster powder to repair it.
It can be treated with cloth or kraft paper;when scraping putty, If you find raised sand grains or other debris, you should dispose of them in time.
If you want to shave putty quickly and well, you need to master certain skills.
Scrape the top part and the upper part of the wall first, and finally the lower part of the wall; the key to the action of scraping putty is to use even force on the wrist and scrape diagonally so that the excess putty can be collected.
When scraping the wall, try to scrape left and right, don't scrape up and down; ingeneral, scrape the putty three times.
When painting, be sure to brush the second time after the first time is dry, so as to avoid the situation of brushing off the wall; We’d better control the thickness of the putty at about 2mm, and it’s best not to exceed this size requirement; for light polishing, the treatment of the yin and yang angles must be vertical and horizontal;be sure to avoid direct cold wind, so although it seems that the wall can be It is blow-dried, but it actually locks the moisture on the wall inside the wall.
If you perform the next step at this time and wait for the heating in winter, the original non-dry wall material will begin to evaporate and appear " The situation of "dry cracking"; the quality of the roller brush is also the key to considering the quality of the putty.
Therefore, the roller brush must be good, such as the hair quality and the amount of hair need to be moderate and uniform, after all, this directly affects the effect of painting.
What causes the blistering and shedding of the putty? 1.
The bonding is not strong.
Cracks, peeling and shedding of the putty are mainly caused by the weak bonding of the putty to the base layer.
If the base layer is not cleaned or the treatment method is improper, the template release agent, oil kerosene, inorganic acid and organic acid on the base layer are not completely removed, the alkali aqueous solution (used to remove the wall oil stain) is not brushed, and no adhesive or putty is applied.
Improper dosage of formula emulsion will reduce the bonding strength of putty and base layer as a result.
The test data proves that if the base layer is treated well, the bond strength can generally be increased by 5-9 kg/cm².
Adding emulsion can improve the bonding performance of the mortar and the base layer, and the general bonding strength can be increased by 4-7 kg/cm2; 2.
The putty coating is too thick.
The thickness of the putty coating is related to the choice of material and mix ratio.
Such as scraping large white putty, in order to facilitate the operation, the content of talc powder is increased to improve the lubricating performance of the putty.
Under normal circumstances, the coating will not be too thick; but if the filling effect of the putty is started, the content of large white powder will increase.
The white powder particles are relatively coarse, and the putty has poor lubrication performance and is not easy to operate.
At this time, the coating may be too thick.
It can be seen that the key to prevent the coating from being too thick is to properly adjust the amount of white powder and talcum powder; 3.
The cracking caused by the main structure has nothing to do with the quality of the putty and the construction method; 4.
Other reasons, such as double putty The interval is too short.
If the first putty is not completely dry, the second putty will be scraped, which will easily cause drying and shrinkage, which will cause peeling and peeling.
In addition, different putties should be used for internal and external walls.
Understand the ratio of putty and water, and mix the putty with uniform quality and excellent quality.
Put the right amount of water in the bucket according to the ratio, then pour in the right amount of putty powder, install the electric drill on the mixing head, power on and stir until it is sauce-like;before scraping, use a broom and putty knife to clean the wall Clean, it is very important to clean the base layer of the wall.
If there are seams or missing corners, we must use plaster powder to repair it.
It can be treated with cloth or kraft paper;when scraping putty, If you find raised sand grains or other debris, you should dispose of them in time.
If you want to shave putty quickly and well, you need to master certain skills.
Scrape the top part and the upper part of the wall first, and finally the lower part of the wall; the key to the action of scraping putty is to use even force on the wrist and scrape diagonally so that the excess putty can be collected.
When scraping the wall, try to scrape left and right, don't scrape up and down; ingeneral, scrape the putty three times.
When painting, be sure to brush the second time after the first time is dry, so as to avoid the situation of brushing off the wall; We’d better control the thickness of the putty at about 2mm, and it’s best not to exceed this size requirement; for light polishing, the treatment of the yin and yang angles must be vertical and horizontal;be sure to avoid direct cold wind, so although it seems that the wall can be It is blow-dried, but it actually locks the moisture on the wall inside the wall.
If you perform the next step at this time and wait for the heating in winter, the original non-dry wall material will begin to evaporate and appear " The situation of "dry cracking"; the quality of the roller brush is also the key to considering the quality of the putty.
Therefore, the roller brush must be good, such as the hair quality and the amount of hair need to be moderate and uniform, after all, this directly affects the effect of painting.
What causes the blistering and shedding of the putty? 1.
The bonding is not strong.
Cracks, peeling and shedding of the putty are mainly caused by the weak bonding of the putty to the base layer.
If the base layer is not cleaned or the treatment method is improper, the template release agent, oil kerosene, inorganic acid and organic acid on the base layer are not completely removed, the alkali aqueous solution (used to remove the wall oil stain) is not brushed, and no adhesive or putty is applied.
Improper dosage of formula emulsion will reduce the bonding strength of putty and base layer as a result.
The test data proves that if the base layer is treated well, the bond strength can generally be increased by 5-9 kg/cm².
Adding emulsion can improve the bonding performance of the mortar and the base layer, and the general bonding strength can be increased by 4-7 kg/cm2; 2.
The putty coating is too thick.
The thickness of the putty coating is related to the choice of material and mix ratio.
Such as scraping large white putty, in order to facilitate the operation, the content of talc powder is increased to improve the lubricating performance of the putty.
Under normal circumstances, the coating will not be too thick; but if the filling effect of the putty is started, the content of large white powder will increase.
The white powder particles are relatively coarse, and the putty has poor lubrication performance and is not easy to operate.
At this time, the coating may be too thick.
It can be seen that the key to prevent the coating from being too thick is to properly adjust the amount of white powder and talcum powder; 3.
The cracking caused by the main structure has nothing to do with the quality of the putty and the construction method; 4.
Other reasons, such as double putty The interval is too short.
If the first putty is not completely dry, the second putty will be scraped, which will easily cause drying and shrinkage, which will cause peeling and peeling.
