1. Coil substrate thickness

The thinner the color-coated steel coil, the higher the price. For example, the price of 0.13-0.16mm is relatively high, the price of 0.3-0.45mm changes little, and the price of 0.45-0.7 is basically the same. Because the thinner the color-coated steel coil, the more meters per ton of steel coil and the larger the area. It will use more paint and a longer processing time.

2. Thickness of zinc layer

The price depends on the different thickness of the zinc layer. For example, the price of 20 grams of zinc coating and 50 grams of zinc coating is very different. If the customer has no requirements for the zinc layer, it is recommended to choose a steel coil with a zinc layer of about 30 grams. The price of color coating is also affected by the aluminum content, and the price of color coating with 25% and 55% aluminum content is quite different. If the environment used by the customer is general, you can choose the color-coated steel coil with an aluminum content of about 25%. If it is used in a humid, outdoor and perennial tropical climate environment, it is recommended to choose a color coating with a higher aluminum and zinc content.

3. Paint thickness

There are two types of color-coated steel coils: single-side color coating and double-side color coating.

Under normal circumstances, the thickness of the single-sided color-coated top paint film is 11-30um, and the thickness of the back paint is 5-10um. The thickness of the top coat of double-paint color coating is 11-30um, and the thickness of the back paint is also 11-30um. The price of single-sided color coating is lower than that of double-layer color coating. Customers need to choose the appropriate color coating according to the application and environment.

4. Type and brand of paint

The type and brand of paint also have an impact on the price of color-coated steel coils: paints are mainly divided into: PE polyester color plate, PVDF fluorocarbon color plate, HDP high weather resistance color plate and SMP silicon-calcium color-coated steel plate. PE coatings are used the most, and the price advantage is relatively large. PVDF coatings, HDP coatings and SMP coatings have a longer service life than PE coatings, but are more expensive. Better paint brands include Nippon, Aksu, etc. Customers also need to choose the paint brand according to the use place and environment of the color coating.

5. Packaging

The packaging of color-coated steel coils includes simple packaging, standard export packaging and special packaging.

Simple packaging, suitable for short-distance transportation, the outer layer is protected by waterproof kraft paper, the protection performance is simple, and the price is low.

The outer surface of standard export packaging is waterproof kraft paper and galvanized iron packaging. The outside of the steel coil is also protected with a galvanized iron sheet. Used in long-distance transportation and containers, using steel wire reinforcement. It can better protect the surface of prepainted steel coils. The waterproof effect is better. This type of packaging is the most widely used.

Special packaging includes vertical packaging or customer-required packaging. This packaging method can calculate the price according to the packaging cost. Vertical packaging is core up and the bottom is fixed on a wooden pallet. This packaging method protects the steel coil from external forces to the greatest extent, but the packaging cost and labor cost are relatively high.