Can anyone tell me how to scrape putty? How to scrape putty

Scraping putty, also known as putty, is a manual work. The delicate project should be scraped and coated with putty many times, and each scraping is required to be fully dried, and dry or wet sanding with sand. The putty layer should not be too thick at one time, generally it should be below the millimeter, otherwise it is difficult to dry, and it is easy to shrink and crack.

When scraping putty, hold the flat putty board with your left hand and hold the scraper with your right hand. There are two ways to hold the spatula: one is to hold the thumb and index finger and middle finger, which is suitable for holding the horn scraper, rubber scraper and steel scraper; Another way to hold it is a fist gripper, which is suitable for holding putty shovel blades.

When scraping putty, press and hold the scraper firmly to tilt the scraper and the surface of the object at a certain angle and scrape it along the surface.

There are several ways to scrape putty:

1) Round-trip scraping method. It is to first apply the putty to the edge of the plane into a line, the tip of the scraper is pushed outward at an angle of 30 ° 45 ° to the front, the putty is scraped and applied to the low depression, and the excess putty is squeezed on the right side of the scraper edge to form a line. When the scraper scrapes to the front end, the tip of the blade turns to a 30° 45° angle and rotates back, and the putty is scraped and applied to another low depression, and the excess putty forms a line on the right side of the scraper.

This round trip is carried out to achieve the purpose of filling the whole object surface, and this method is suitable for scraping and coating the flat body.

2) One-sided scraping method. That is, the scraper is only scraped to one side, such as scraping from top to bottom, scraping from front to back, or scraping from bottom to top. Scraping putty on the car body is scraped from top to bottom or from front to back.

3) Scraping method for round objects. Round objects can be scraped with a rubber scraper. Due to the elasticity of the eraser, the eraser can be deformed with the round surface, and the putty can be scraped into a circular layer, and other scrapers can also be used, but it is necessary to master the skills.

4) Scrape the putty all over. That is, the entire surface of the object is scraped. This is especially true when decorative surfaces are required. Sometimes it is also necessary to combine with local embedding to meet the technical requirements. The putty used for full scraping should be softer and easier to handle.

5) Local embedding. For surfaces with defects such as large holes, which do not require high surface smoothness, local batch or embedding can be used. Locally embedded putty can be harder.

Buy talcum powder, 801 glue, which glue powder seeps into a mud, cooked glue powder is released a little bit with water, do not add water, all use 801 glue so firmly, sweep the wall ash when scraping, scrape and dry, smooth with sand, brush and paint.

Putty powder with latex. Water also has cellulose, so the scraping effect will be better

First of all, put the product in the bucket according to the proportion, and then pour the appropriate putty powder into the bucket. Stir well with an electric drill, then clean the wall with a broom and putty knife, and repair the unevenness with gypsum powder.

Then scrape it vigorously and evenly to clean the extra putty. Finally, the putty needs to be scraped three times, and each time you have to wait for the last time to dry before you can do the next one.

When the absorption is strong, it is necessary to carry out a closed treatment, so as to prevent the base layer from being absorbed in large quantities, which can also affect its adhesion. At the same time, the clarity of the tool should also be controlled, and the force should also be done in Wuxi when carrying out construction, so as to ensure its fullness.

Scraping putty process:

1. Base treatment: cast-in-place concrete wall, due to the reasons of floor slabs, materials, separators and other reasons, the flatness of the wall is poor, and there are often pores, honeycombs, hemp surfaces, yin and yang angles are not smooth and bulging, so it is required that the convex places are smoothed and smoothed, and the recesses should be filled and filled. Liang quietly for the precast concrete floor slab, slab joint base, must be brushed by a special person with a wire brush to remove the surface of the floating sand, pimples, dust and other debris.

For the cement mortar paper reinforcement ash surface layer, the surface base layer is required to be dry, solid and clean (no floating soil oil stain).

2. Grassroots repair: After the concrete roof and slab joints are cleaned, the gypsum putty is filled and compacted with a steel scraper for the larger defective parts such as honeycomb, and the horizontal wipe is scraped vertically (the top surface with a smooth surface can not be scraped). Gypsum putty ratio (weight ratio) for gypsum:

Emulsion: cellulose aqueous solution (concentration 5 = 100:5 6:

60。Brush caustic soda solution: Brush twice with 5" degree caustic soda solution, if you use 10" degree to brush once.

It should be rinsed with water immediately with the brush, and then the next process should be carried out after drying.

3. Coating binder (juice slurry): spray glue before scraping putty, spraying must be uniform and consistent, and there shall be no leakage where the glue ratio (weight ratio) is clear water: emulsion = 100:

15～20。Scrape the big white putty: scrape the putty with a steel scraper to scrape back and forth, pay attention to the upper and lower left and right connections, between the two scrapers to be clean, do not allow floating putty, scrape putty to prevent staining or mixing into sand and other debris.

The mix ratio (weight ratio) of large white putty is large white powder: talc: cellulose solution (concentration 5:

Emulsion = 60:40:75:

4. Repair and grinding: after the first putty is scraped, it should be rechecked in the part after the first repair, if there is a problem, use the greasy leakage slag code to repair and level the collapsed part, and after the putty is dry, polish, smooth and sweep with sandpaper.

5. Putty survival: scrape the big white putty twice, and then scrape it a second time after the first putty is dry, which is generally required to survive at least twice. The surface is required not only to be smooth but also to have a uniform texture, otherwise it is easy to have inconsistent color shades and affect the decoration effect.

Precautions: First of all, we have to choose the best putty, which is a prerequisite for scraping the putty. Know the ratio of putty to water and mix it well.

If there will be cracks or missing corners, we will repair it with gypsum powder, paste cloth or kraft paper. If you scrape putty, you should generally scrape it three times, and when you are constructing, remember to wait until a certain degree of dryness to scrape the putty for the second time.

The thickness of the putty scraping should be controlled at about 2mm, and it is best not to exceed this size requirement. If the weather is cold to scrape the putty, the putty will be maintained, if it is not completely dry, it is best to close the windows, this is to avoid the dry wind to dry the putty, blowing cracking.

For light polishing, the treatment of yin and yang angles must be vertical and horizontal. When we scrape putty, if we find that there are raised sand particles or other debris, we should dispose of them in time.

Scrape puttyScrapeThe methods include base treatment, putty scraping, grinding and repairing, and putty survival.

1. Grassroots treatment: To deal with the grassroots level, you can use stone putty to make up for it.

2. Scrape putty: spray the binder first, and then start scraping putty on the wall to prevent the putty from getting dusty.

3. Grinding and repair: After the first putty is dry, polish it with fine sandpaper.

4. Putty survival: The putty should be scraped twice, and the wall putty should be smooth and uniform.

Precautions for scraping putty

1. The ratio of water and putty powder.

2. The putty we scrape is not asking for light but leveling.

3. The putty on the wall is generally required to be scraped three times, but each time the putty is scraped, it is required to be painted again after it has dried.

4. When scraping putty, we must avoid cold wind blowing directly, so that although it seems that the wall can be blown dry, but in fact, it is to lock the moisture of the wall in the wall.

5. When the base layer has strong absorption, it should be closed with a primer before scraping the putty, so as to avoid the rubber in the putty being too absorbed by the base layer. Affects the adhesion of putty.

6. Master the inclination of the tool when scraping and applying, and use even force to ensure that the putty is full.