Wallpaper can add color to the room certainly not little, but wallpaper often can appear a series of problems after be pasted in the shop, for instance become warped edge, craze, mildew, change color, make a person very vexing, so why can wallpaper appear these problems? What should I do when something goes wrong?

One, wallpaper surface is bulged

Analysis:
(1) uneven gluing, partial lack of glue solution, and bubble empty drum formed after drying wallpaper.

(2) the local glue solution is too much and too thick to be fully absorbed naturally. When the wallpaper is dry, it forms a solid bulge.

(3) the base layer is putty, the coating is not firmly delaminated, and the base film is not completely dry. The construction results in the base layer delamination, which causes the wallpaper surface to bulge.
Treatment method:
Before installation, the wallpaper should be installed after the base film is completely dry. The empty drum can not be fully absorbed by the glue solution. The slight empty drum of base descaling can be repaired by injecting white latex, and the base can only be replaced by tearing up the wallpaper.

2. The wallpaper is affected by damp and mildew

Analysis:
The rapid spread of mold spores over a long period of time in a humid and warm environment is known as mildew. Generally, mildew requires 4 conditions: mold source (mildew spores can be carried in the air), humid environment, persistent high temperature, and nutritional basis for the growth of mold spores.

Treatment method:
(1) make the wall waterproof, and pay special attention to the other side of the wall for the bathroom.

(2) apply the base film evenly and completely close the wall.

(3) select high-quality wallpaper adhesive to prevent inferior wallpaper adhesive from deterioration and mildew.

(4) during the construction, the wallpaper adhesive should be uniform and appropriate, and the excess adhesive liquid should be scraped by the scraper or other professional tools.

(5) after the wallpaper is constructed and the joints are completely dried (about 48 hours, which depends on the site environment and the wallpaper base), open the window to ventilate the indoor humidity.

The wallpaper changes color

Analysis:
Wallpaper color mainly by sunlight irradiation, oxidation or dampness and other reasons. The color change that long time sunlight illuminate produces generally can be more even, most won’t affect the effect. The discoloration of wallpaper caused by oxidation or dampness will directly affect the visual effect, especially the discoloration of products with metal printing materials (such as gold, silver and gold foil).

Treatment method:
(1) during the construction process, all foreign acidic and alkaline materials should be eliminated to avoid contaminating the wallpaper.

(2) make the wall wall waterproof to avoid color change of wallpaper caused by excessive humidity.

(3) the PH value of the selected putty on the wall is neutral 7 + / -0.5, which ensures that the wall has been completely closed and properly treated, so as to isolate the anti-exudation of alkaline substances from the wall.

(4) choose high-quality base film and wallpaper adhesive with neutral PH value. The base film coating must be closed to cover the wall, and it must not be leaked.

(5) chemical liquids such as alcohol and pesticide should not be sprayed directly on the wallpaper surface.

Four, the wallpaper warps the edge, the slit

Analysis:
There are many factors that make up the wall paper’s edge warping, and there are different degrees of correlation between each other.

Possible causes and treatment:

1. Improper construction:
(1) sun exposure and strong wind blow, resulting in uneven contraction and local cracking.

(2) the softening time is too long, the expansion is too long, and the shrinkage seam is formed after drying.

(3) the glue concentration is too low and the adhesion is not enough to stick to the wallpaper.

(4) excessive glue solution and uneven contraction.

(5) excessive force of the scraper during pasting, or excessive elongation and width of the wallpaper during construction, resulting in excessive stretching, and contraction joint after drying.

(6) when double cutting, the blade is repeated and the seam is visible.

(7) the operator is not strict with the sewing.

Treatment method:
Clean paper and PVC wallpaper, wet the joints with a wet towel, after 4-5 minutes to uncover the wallpaper, brush the adhesive and paste again. Non-woven paper and velour wallpaper, no dilatancy wallpaper, general can tear up the whole, first uncovered wallpaper, with thumb and forefinger slightly elongate then brush adhesive paste.

2. Improper products:
This includes improper selection of products and improper allocation of products. Before construction, should evaluate the wallpaper that will undertake construction above all, best can do beforehand the stickup test of attempt, choose appropriate adhesive product, cannot rely on experience to act solely. Be like with the wall paper of general performance glue pink stickup thick wall paper; There is no package instruction when the product is deployed. The wallpaper adhesive powder was unevenly mixed and did not completely gelatinize. Improper stripping method, resulting in the pellet, low viscosity, and so on.

3. Environmental factors:
The temperature that includes construction and humidity condition, the firmness of metope base (be bored with child), metope smooth finish and absorbent, metope close processing effect, the bearing capacity of construction surface, in this kind of circumstance blind construction, inevitable meeting appears a problem.

Good wallpaper effect presentation also needs good pasting state to do safeguard, a little more heart, a little more trouble!