In recent years, heavy metal pollution in the soil has been a frequent problem in China, and the problem of heavy metals exceeding the standard in rice and wheat crops is also worrying. Therefore, the prevention and remediation of soil heavy metal pollution needs to be strengthened. Based on the following three points, the Iron Box can better protect the tea packaging and protect the tea.
For the current market, iron box packaging is widely used, such as tea iron boxes. Due to the diversity of printing on the surface of the iron box and good gloss, it is more beautiful and high-grade. The reason why people like to use iron boxes for packaging is that the compatibility strength of iron boxes is good and they are suitable for preservation. In recent years, there are all kinds of packaging materials on the market. From wooden boxes, plastic boxes to iron boxes, among which iron boxes are the first choice for tea packaging. Tea Tin Box,Tea Iron Can,Tea Iron Boxes,Gift Box Tea Tin Can,Tin Can Dongguan Tielangtou Hardware Products Co., Ltd , https://www.tinboxtlt.com
There are many foreign work on the investigation of large-scale pollution conditions and cause analysis, and the use of portable heavy metal detectors for long-term dynamic monitoring. In recent years, China has also conducted several large-scale pollution surveys and conducted detailed investigations of soil pollution. However, it still lacks authoritative source list of soil and food crops based on historical big data and source analytical techniques. Soil and food crops The comprehensive analysis of heavy metal content and the work on model simulation also need to be strengthened. 
At present, most of the relevant research work is limited to the pot experiment or field plot test, and the control conditions are quite different from the actual production environment and production operation in Daejeon. Because of the lack of large data volume and multivariate monitoring and analysis, it is difficult to perform statistical correlation analysis between the national soil pollution survey results and the food crops with heavy metals exceeding the standard. In particular, the spatially quantitative relationship between the two is unclear. The soil pollution monitoring results may be consistent with the food crop pollution assessment results. There may also be phenomena where the heavy metals in the soil exceed the standards and the corresponding heavy metals do not exceed the standard, or the heavy metals in the crops where the soil heavy metals do not exceed the standards exceed the standard. At present, the academic community pays more attention to soil pollution problems, but there are relatively few studies on the heavy metal pollution in the soil-grain crop system and the quantitative relationship between the two.
Nowadays, what needs to be done is to focus on the characteristics of mild to heavy metal-contaminated farmland in China, and adhere to the principle of prevention, priority protection, management and control, repair supplementation, demonstration guidance, and adaptation to local conditions. The development of portable heavy metal detectors for field testing is By means of measures to strengthen the support and repair and restoration of technical support, a farmland soil pollution control management system consisting of laws and regulations, standards systems, management systems, public participation, scientific research, and public education will be formed.
1. Tightness of the iron box.
Tea will deteriorate when exposed to the air, so the first key to storing tea is to seal it. The iron box has a low oxygen permeability, which has a good barrier to the air and can better protect tea.
2. Reducibility of iron box.
Chemical action of the iron box: good reducibility, the tin in the iron box will react with the oxygen remaining in the container during filling, which is the reduction of tin. The reduction of tin can reduce the chance of oxidation of tea nutrients and prolong the storage life of tea
3. Light opacity of iron box
Light is easy to cause deterioration reaction of tea and change of food quality, especially green tea is easy to deteriorate in case of light. The lightproof of the iron box makes the preservation rate of tea higher. In addition to keeping the original flavor of tea, even the color will not change.