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The spray can is based on tinplate, covering the bottle body, bottleneck and other key parts. The advantage of tinplate is its corrosion resistance and mechanical strength, which enables the product to withstand the test of long-term use in industrial chemical packaging.

The thickness of this product is between 0.18 and 0.2 mm. It has been professionally coated. The inner wall is coated with pure gold paint, and the exterior is CMYK 4-color offset printing. This not only improves the pressure resistance of the product, but also ensures that the liquid stored inside will not react with the tank wall, ensuring the purity and safety of the contents.

Reasons why tinplate packaging cans are prone to corrosion: 1. The protective effect of the tin layer is limited ● Uneven thickness of the tin layer ● Scratches or damage to the tin layer ● Chemical reaction between the tin layer and the contents 2. Corrosion susceptibility of the steel substrate 3. The influence of the use environment on corrosion ● High humidity environment ● Acid and alkali environment ● High temperature environment ● Contact with different chemicals 4. Electrochemical corrosion ● Contact between different metals ● The presence of electrolyte solution

Internationally, the thickness of tinplate is usually between 0.13mm and 0.50mm, but the thickness of tinplate used for food packaging is relatively thin, usually concentrated in the range of 0.13mm to 0.30mm.

Key factors for selecting ink suitable for tinplate printing: 1. Adhesion of ink 2. Heat resistance of ink 3. Chemical resistance of ink 4. Gloss and color performance of ink 5. Drying speed of ink 6. Environmental protection and safety of ink

Tinplate products in food packaging: 1. Tinplate packaging in canned food ● Canned food ● Canned soup and liquid food ● Canned high-acid food 2. Tinplate products in beverage packaging ● Metal beverage cans ● Tea cans and coffee cans 3. Tinplate products in candy and snack packaging ● Candy boxes ● Biscuit and cake cans ● Potato chip cans 4. Tinplate products in dairy and milk powder packaging ● Milk powder cans ● Dairy packaging cans 5. Tinplate packaging for condiments and oily foods ● Condiment cans ● Edible oil packaging cans

Tinplate is actually a composite material, its core part is low-carbon steel plate, and the surface is plated with a thin layer of tin. Therefore, tinplate is mainly composed of two materials: steel plate (iron) and tin.

For the question of "Is tinplate packaging can flammable?", we can get the answer from the properties of its main materials. Generally speaking, metal materials are not flammable because they do not contain flammable components such as hydrocarbons

The black marks in tinplate cans are usually caused by corrosion of the can. When the metal in the can reacts with the acid in the food or environment, corrosion occurs, resulting in black marks in the can.

According to industry statistics, in the global canning industry, more than 60% of packaging cans use tinplate materials. This ratio is even higher in certain areas such as food cans and beverage packaging.