Does scraping putty contain formaldehyde

Putty does contain a certain amount of formaldehyde, but it is a necessary substance during construction, so it is best to remove formaldehyde in your room after decoration. Try not to live in the room right away. Wait until the formaldehyde index in the room is close to the normal value before you can start living there. In this way, you don't have to worry about formaldehyde problems.

1. First of all, we need to understand the composition of putty. Putty for construction is divided into ordinary putty and water-resistant putty. Ordinary putty is for indoor use only, and is generally composed of heavy calcium powder (or double fly powder) plus glue powder (that is, modified starch glue with cellulose). The main ingredient of calcium powder is calcium carbonate, which is commonly known as fine powder ground from stone; it does not contain formaldehyde. The materials used in the production of modified starch glue and carboxymethyl cellulose for interior wall putty basically do not contain oily solvents, so they will not contain formaldehyde.

2. Water-resistant putty is made of lime powder or cement as inorganic gelling material, heavy calcium powder (or double fly powder) as filler, redispersible latex powder, hydroxypropyl methylcellulose and other additives. The main component of lime powder is calcium hydroxide (the main component of slaked lime), which and cement are well known to us and cannot contain formaldehyde.

3. Redispersible latex powder is made by spray drying of emulsion. We all agree that latex paint with emulsion as the main bonding material does not contain formaldehyde. We can be more assured that redispersible latex powder has been used in Europe for decades. Hydroxypropyl methylcellulose is a powder that is completely soluble in water. It is also used in some foods and is completely formaldehyde-free.

What are the issues that need to be paid attention to when scraping putty on the wall?

1. When you are going to paint the wall with latex paint, and the wall was originally painted with lime or paint, you must first scrape off the original wall and re-scrape the putty before painting. For customers who buy colored latex paint themselves, the editor reminds everyone to add water to the latex paint in one go to avoid color blocks and color differences when painting, which leads to incoordination and other situations.

2. The quality of the roller brush is also the key to considering the quality of putty. Therefore, the roller brush must be of good quality, and the bristle quality and quantity must be moderate and uniform. After all, this directly affects the effect of painting. When painting, the ceiling should be painted first and then the walls.

1. When painting, be sure to apply a second coat after the first coat is dry to avoid peeling off the wall. When painting, if you want a light color effect, you only need to paint twice. If you want a rich color, you need to paint three times.