This chapter is applicable to the application of varnish to the surface of wood such as wood parapets, hardwood doors and Windows, door and window sets, fixed furniture, and hardwood handrails of stairs in senior civil buildings.

I. Main materials:

Paint: varnish, alkyd varnish, bottom varnish, surface varnish, paint sheet, etc.

Filling material: gypsum powder, white powder, pigment, etc., the putty should be used in accordance with the performance of the paint.

3 Thinner: alkyd thinner, gasoline, alcohol, etc.

4 Polishing agent: soap, sand wax, polish wax, etc.

5. The plasticity and workability of putty used should meet the construction requirements, and should be selected according to the performance of primer and topcoat.

6 Paint and supporting materials are required to have factory certificate, quality certificate, coating harmful substance content test report. The content of harmful substances in the coating and the selection of diluents need to comply with the relevant provisions in the “Limit of harmful Substances in solve-based wood Coatings for Interior decoration Materials” (GB18581-2001) and the “Code for Indoor Environmental Pollution Control of Civil Construction Engineering” (GB50325-2001).

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

Ii. Main machines and tools:

Main machine tools include: knife, steel scraper, rubber scraper, horn scraper, paint brush, row brush, oil brush, putty tank, big paint bucket, small paint bucket, oil spoon, measuring cylinder, gauze screen, hemp silk, lint cloth, cotton silk, white cloth, mask, gloves, wood sandpaper, water sandpaper, pliers, small hammer, safety belt, high stool, foot board, polishing machine, etc.

Iii. Operating Conditions:

1 Wet operation has been completed, the environment is clean and dry, well ventilated, the operating temperature is stable above 10℃, and the relative humidity should not be greater than 60%. The moisture content of the wood base is not greater than 10%. If the interior is not closed when painting construction, there should be wind protection measures, otherwise the construction shall not be carried out in windy weather.

Before LARGE-area construction, make a sample in advance, after the owner and quality inspection department acceptance and identification, large-area construction can be completed.

3. Before construction, the handover inspection should be carefully carried out with the previous process, and the problems found should be dealt with.

4 For the operation above 3.6m, scaffolding should be put up in advance, and after safety acceptance, the plumbing and electrical engineering construction is completed.

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

Iv. Operation process:

(I) Process flow:

(2) Operation process:

1. Basic treatment: remove dust and stains from wood surface. If there are oil stains, can be scrubbed with thin material. The depth of the cap into the wood surface should be greater than 0.5㎜. Polish the base surface along the wood grain, not horizontal grinding or oblique grinding. After grinding and grinding all floating objects, wipe the surface clean, such as wood surface color should be done bleaching treatment (bleaching agent generally with hydrogen peroxide: ammonia =4:1).

2. Sealing oil, putty polishing: first sealing oil and putty polishing smooth.

3. Brush THE FIRST TIME varNISH: varnish should be painted along the direction of wood grain, not horizontal brush, oblique brush, leakage brush and flow fall, and should maintain the appropriate thickness. Varnish after drying should be an interval of one day, to be fully dry, particles and flying spines all warped, conducive to polishing.

4. Color: Rub evenly with a soft white cloth.

5. Brush the second to four times of varnish: check the color, repair effect, meet the requirements, you can apply the second to four times of varnish. After each time the varnish is applied to dry, it should be sanded with 1# old wood sandpaper, and the fine particles on the film should be worn off and wiped clean to apply the next time the varnish.

6. Color MATCHING and color correction: IF the local color is found to be inconsistent with the sample color after the fourth time of varnish, the color matching and color correction should be carried out according to the sample color. Color and repair can use oil color or color essence. The putTY scar with smaller area, can use oil color generally, can use color essence to the color of larger area is inconsistent.

7. Sanding: After the fourth time varnish is dry, use 280# ~ 320# water sandpaper to sanding, requiring smooth and meticulous grinding, and grind all parts to, pay attention to the edges and corners can not be white or worn. After sanding, wipe off the sewage and wipe clean with clean water.

8. Brush the varnish for the fifth time and the sixth time: as the last second time of the varnish grinding process, the application method is the same as above. At the same time, the sixth paint is required to be brushed in succession when the fifth paint is not completely dry, which is conducive to the plenteness and smoothness of the coating film, and is not easy to be worn or worn out in the grinding back.

9. Grinding back: After the last two times of the cover paint is dry, use 400# ~ 500# water sandpaper dipped in soapy water to polish the gloss of the coating surface. When grinding, the force should be uniform, requiring smooth and meticulous grinding, and the surface gloss should be grinded to and smoothed. Wipe and dry after grinding.

10. Sand wax: first of all, the sand wax with kerosene into porridge, with a clean lint dipped in sand wax, along the direction of wood grain back and forth rub, until no bright star so far. The strength should be even, the edges and corners should be rubbed, and the edges and corners should not be worn out. Finally, use a clean lint cloth to wipe the surface of the floating wax, and use the polishing machine to force evenly.

11. Wipe POLISH wax: with a clean white cloth will polish wax package in the inside, repeatedly rub on the paint coating, wipe, wipe, until bright.

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

V. Quality Standard:

(I) Main control items:

1. The variety, type and performance of the paint selected for the paint project should meet the design requirements. The content of harmful substances in the paint and the selection of diluents need to comply with the relevant provisions in the “Limit of harmful substances in solve-based wood Coatings for interior decoration Materials” (GB18581-2001) and the “Code for Indoor Environmental Pollution Control of Civil Construction Engineering” (GB50325-2001).

2. The color, gloss and pattern of the paint project should meet the design requirements.

3. The paint project should be painted evenly, firmly bonded, and must not leak paint, through the bottom, peel and anti rust.

4. The moisture content of the wood base is not greater than 10%.

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

(II) General items:

1. The finish quality and inspection method of wood surface varnish should comply with the following table.

Method for quality and inspection of abrasive finishing of wood surface varnish

General finishing advanced finishing inspection method of the project

1 Color is basically uniform uniform observation

2 wood grain brown eye scraping, wood grain clear brown eye scraping, wood grain clear observation

3 gloss, smooth gloss is basically uniform, smooth no block feel gloss uniform, smooth observation, hand touch inspection

4 Brushless brushless observation

No observation is allowed in the obvious places OF wrapping edge, flowing drop and wrinkled skin

Observe the cleanliness of doors and Windows, hardware and glass

The CONNECTION between the coating and other decoration materials and equipment should be consistent, and the interface should be clear.

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

ASTM D412-0 “Wood Surface Varnish Grinding Retreat”

Vi. Finished Product Protection:

1 Brush oil before first clean up the surrounding environment, to prevent dust flying, affect the quality of paint.

2 Paint each time to pay attention to environmental hygiene, windy weather and indoor cleaning should not be painted. Doors and Windows fan brush after each paint, the doors and Windows with a spike hook or wedge fixed, avoid sticking bad paint coating.

3 Pay attention not to knock and stain the paint surface. The oil stains on the ground should be cleaned in time.

4. After painting is finished, special personnel should be sent to take care of it.

Seven, should pay attention to the problem:

1 angular putty is not smooth: mainly putty is not full, and caused by contraction. The solution is to fill the putty, until it reaches the level, dry with sandpaper polishing level.

2 worn out edges and corners: mainly the edges and corners are easy to wear out and worn out. Do not use too much force when grinding water sandpaper and sand wax, and keep the edges and corners intact.

3 Flow fall: mainly uneven brushing, coating too thick, oil brush with too much oil, or too low temperature caused. The solution is to sand the advection drop with water.

4 Hardware pollution: operation should be careful, timely clean the pollution. Hardware as far as possible after the installation of paint, paint before the hardware installation of the hole drilling good.