Customized Car Shaped Iron Box Candy Box

Raw material introduction
In order to reduce the production cost, not all Tinplate surfaces have tin plating, and the sheet without tin plating is called the base plate. Some base plates are galvanized or chrome plated, which is different from tinned iron. It is a kind of thin steel plate without tinning. As tin is a precious metal, the prices of chromium and zinc are cheaper than tin. If the tinplate surface is not tinned, the most obvious thing is to reduce the production cost.
According to the different requirements of the Packaging industry, the thickness, tin plating amount and mechanical properties of tinplate materials have different needs. Since its inception, tinplate has been developing in the direction of reducing the substrate thickness of tinplate by using less or even no tin. Its purpose is to adapt to the change of canning products and reduce the cost of canning.
1. Opacity
In addition to causing deterioration of food, light can also cause changes in protein and amino acids. Vitamin C is more likely to react with other food ingredients when exposed to light, resulting in a large loss. According to research and analysis, the loss of vitamin C in transparent glass bottle milk is 14 times higher than that in dark bottle milk. Light can also cause milk to produce oxidation odor, as well as the loss of nutritional value due to the cracking of nuclides, methionine, etc. The blackout of tin cans makes the preservation rate of vitamin C the highest.
2. Good sealing
The barrier of container tin to air and other volatile gases is very important for the preservation of nutrients and sensory quality. The comparison of various juice packaging containers showed that the oxygen permeability of the container directly affected the browning of juice and the preservation of vitamin C; Metal tins, glass bottles, aluminum foil adhesive layers, and paper boxes with low oxygen permeability have better preservation of vitamin C, among which iron cans are the best.
3. Reduction of tin
The tin on the inner wall of the tin plate will react with the oxygen remaining in the container during filling, reducing the opportunity for food ingredients to be oxidized. The reduction of tin has a good preservation effect on the flavor and color of light colored fruits and fruit juices. Therefore, the juice cans packed with unpainted iron are better than those packed with other packaging materials in terms of nutrition preservation, slight browning change, better acceptance of flavor quality, and thus the storage life is extended.