1. Color: high quality building formwork shall have natural color, clear wood grain and visible material to the naked eye. If the surface color of the building formwork is deep and the paint layer is thick, it may be intended to cover up the surface defects of the specification of the building formwork, especially when the building formwork is painted on six sides.
2. texture: it is the standard to judge the quality of building formwork. Regular texture is beautiful and generous. Do not use those building formwork with disordered texture.
3. knot: namely knot scar, which can be divided into live knot and dead knot. As a natural product, it is impossible to have no knots. The reasonable distribution of live knots will make the wood products more beautiful. Superior products are not allowed to have defective knots. According to national regulations, all living knots with a diameter of ≤ 3mm and dead knots with a diameter of ≤ 2mm, which are not falling off and very dense, are not regarded as defective knots.
4. cracks: cracks are inevitable in medium and low-grade plastic coated building formwork, but it is not good if it is too large. Some cracks occur between the grain of the wood. These cracks will not extend and can be used safely. However, if some cracks penetrate the grain, you must not buy them because these cracks will extend and have a great negative impact on the future.
In addition, some building templates are made of tree core materials and materials close to the bark, so be careful not to raise the grade price. The wood used in some types of building formwork has been eaten by a large number of insects, so many insect holes are left. The wood of this kind of building formwork is not very good, so it needs to be careful when purchasing.
