How to construct latex paint! Is spraying and roller painting that works better?

Renovation, for many people is a difficult thing. Many people in the decoration will consider a variety of materials: wallpaper, wallpaper, latex paint and so on ... Of course, according to statistics, 70% of households will eventually choose latex paint to decorate. Because latex paint construction operation and environmental protection, durability are superior to other materials, and commonly used
chinese
.
generally speaking, our latex paint construction steps are simply divided into four parts:
substrate treatment ---- scraping putty---- construction primer (1 time) ---- construction paint (2 times)
. And the inner wall construction environment requirements are temperature > 5 degrees C, relative humidity ≤ 85%.
substrate treatment:
1, cement substrate
characteristics:
surface porous, fast drying, strong absorption, strong alkaline, prone to empty drums, cracking and burst ash.
treatment:
clean, oil-free, mold-free, algae and other attachments.
pH is less than 10 and the moisture content is less than 10%. (In the case of a new alkaline wall, wash it with a 5% aqueous solution to meet the requirements.)
2, gypsum board
characteristics:
surface smooth, strong absorption, low strength, poor water resistance, water will be soft, easy to yellow.
treatment:
stitching part must be attached to the seam paper
band to prevent
cracking;
3, splint
features:
surface smooth, low absorption, water variability.
treatment:
stitching part must be attached to the seam paper belt to prevent cracking.
4, old wall renovation:
features:
wall more oil, floating ash, empty drum or cracks, low water absorption.
treatment method:
should first remove the floating ash, remove the sand skin and other parts. For oily, chalk handwriting, color is obviously dark, etc. , the original coating should be eliminated first, can not be eliminated the application detergent thoroughly cleaned. Use putty to level the wall. If the walls are flat, don't scrape putty.
the old wall for imitation porcelain paint, must be eradicated, otherwise there will be shedding, yellowing and other ills.
for silky cracks in the wall, use elastic products directly, and for larger cracks it is recommended to fill with elastic putty.
putty layer treatment (acceptance criteria)
bonding strength
: put transparent glue on the putty, slightly torn off, if the glue is not stained with dust to prove that the putty is more dense
sparen degree
: Sprinkle water on putty and observe water infiltration
water content
: moisture content meter; moisture content less than 12%
pH
:p H test paper, pH<10.
primer
a closed effect to prevent the alkaline substance from seeping out of the substrate.
the filling effect to make up for the uneven substrate.
Improves the adhesion of finishes and substrates
ensures the perfect effect of the paint, enhances the feel of the paint film, gloss uniformity, paint film plumpness
paint
according to the gloss classification: glossy paint and matte finish
sheen is the reflective ability of the coating surface to the light. Mainly related to emulsion and light powder
by grade classification: engineering products, mid-range products, high-grade products
paint construction method
brush coating:
roller coating:
airless spraying:
three differences:
attention to key items
1, latex paint construction water can not exceed 30%.
2, the construction floor does not need to be polished. If polished, lightly grind with sandpaper above 600 eyes.
3, the construction environment must meet the film conditions of latex paint:
4, in case of low temperature, you must raise the room temperature to more than 5 degrees C, can use heating, electric heater, high wattage bulbs and other ways to improve the temperature. If the humidity is greater than 85%, the humidity must be reduced, air conditioning can be used to dehumidification, dehumidifier and other methods.
5, such as strong convected weather, the need to properly close doors and windows, reduce air convect.