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HJ T220-2005 "Adhesives for Environmental Labeling Product Certification".
HJ T201-2005 "Technical Requirements for Environmental Labeling Products Water-based Coatings".
According to the materials and quality of the products, it is divided into three grades: (high), (medium) and (general).
Vertical windows. Horizontal windows.
Concave and convex windows. Curved windows. >>>More
The amount of formaldehyde released in fiberboard, particleboard, plywood, blockboard, veneer veneer and other products shall not exceed mg cubic meters; >>>More
If you use solid wood for the window sill, try not to use logs, which are more likely to be polluted, and rainwater, so it is better to use composite wood.
The main reason for the deformation is that the temperature difference between the outside and inside of the window is large, and the solid wood window must be easy to remove. After removing it, put the two ends of the solid wood window on the stool, put it in the sun, and press some heavy objects in the middle! Take a look, don't bend over there!