1. Use bleach: If the watermark on the wall is shallow, you can try to remove it with bleach. Mix bleach with a small amount of hot water, then evenly spread bleach on the watermark with a brush, wait for 10~ 15 minutes, and then scrub with clean water. When using, pay attention to the dilution ratio not to be too high, so as not to destroy the color of the wall.
2. Use titanium dioxide pigment: There is a professional coating on the market-titanium dioxide pigment, which can effectively remove the watermark from the wall. Titanium dioxide pigments is mixed with water, and then the mixed solution is evenly coated on the watermarked wall with a brush, dried, coated for the second time, and then dried. The advantage of this method is that it will not cause damage to the wall and the effect is lasting.
3. Use a dryer: Some watermarks are dried by moisture. At this time, we can use the dryer to blow air at the watermark to evaporate the water on the wall. When using the dryer, you need to pay attention to the fire source and safety issues, and don't let the drying place be too hot to cause a fire.
4. Use professional cleaners: If the watermark on the wall is stubborn, you can find some professional cleaners to get rid of it. These detergents help to remove water stains without damaging the walls. Pay attention to the instructions when using it, and dilute it when using it.
In a word, we need to adopt different methods to deal with the watermark on the wall according to the situation. For simple watermarks, we can use cleaners and dryers to clean them ourselves, while for more complicated problems, we should seek the help of professionals. To prevent watermark from appearing, attention should be paid to indoor dry environment and water vapor emission.