Venetian blind products have different surface treatment methods, so they should be selected according to their needs. Several common methods and characteristics are as follows. Surface spray molding. Plastic is attached to aluminum alloy by plastic spraying process, which has the advantages of acid resistance, alkali resistance, oil resistance, aging resistance, impact resistance and insulation, and its firmness is better than that of painting. Bake (spray) paint on the surface. Choose high-quality amino flat paint, rich in color and firm in baking paint. Spray flowers on the surface. Using surface spraying technology (various design trademarks), the curtains have flower-shaped colors. Lifting adjustment venetian blinds's lifting adjustment means that when the lifting rope swings to the inside of the curtain for about 30 degrees, the lifting rope can freely contract, and the venetian blinds of the curtain changes height with the contraction of the lifting rope. When it is adjusted to the position you want, just swing the hanging rope to the outside of the curtain 15 degrees and then relax, and the shutter can stay in this position. Pull (rotate) the blade angle adjustment rope (lever) to adjust the blade at any angle.