The difference in environmental protection between painted doors and paint-free doors

When choosing interior doors, painted doors and paint-free doors are two common choices. They have some differences in environmental characteristics, the following is the specific comparison:

First, the environmental protection characteristics of painted doors
(1) Formaldehyde emission
Painted doors require the use of paint in the production process, although modern painting processes have greatly reduced the release of harmful substances such as formaldehyde. However, if a poor quality paint is used, there may still be a certain risk of formaldehyde release. In general, the formaldehyde release of painted doors is controlled between 0.08-0.12 mg/m2 · hour.
(2) VOC release amount
Painted doors release volatile organic compounds (VOCs) during production, which have an impact on indoor air quality. However, with the improvement of environmental standards, many painted door products have adopted low-VOC environmental paint.
(3) Surface treatment
The surface treatment process of painted doors is more complex and needs to go through multiple processes, including primer, putty, medium paint and top paint. Each process usually requires high temperature baking, which not only increases production costs, but also may have a certain impact on the environment.

Second, the environmental protection characteristics of paint-free doors
(1) Formaldehyde emission
The paint-free door adopts PVC veneer or vacuum blister process, which does not require the use of paint. Therefore, the formaldehyde release of paint-free doors is usually low, generally less than 0.05 mg/m2 · hour, in line with E0 level environmental standards.
(2) VOC release amount
Since paint-free doors do not require the use of paint, the VOC release is almost negligible. This makes paint-free doors have obvious advantages in terms of environmental protection, especially in terms of indoor air quality.
(3) Surface treatment
The surface treatment of the no-paint door is relatively simple, mainly completed by PVC veneer or vacuum blister process. This process not only reduces the release of harmful substances, but also reduces energy consumption in the production process.

From an environmental point of view, paint-free doors are usually more advantageous than painted doors. Paint-free doors do not require the use of paint, so formaldehyde and VOC emissions are lower. Although the release of harmful substances has been greatly reduced under the modern production process, there may still be a certain risk. Therefore, if environmental protection is your primary consideration, paint-free doors may be a better choice.
It is hoped that this information will help you better understand the environmental differences between painted doors and non-painted doors, so as to make a choice that is more in line with your needs.