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Thermal color-changing pigments for packaging: Temperature-Sensitive index
Today there is Jianfeng Chemical production plant, which produces thermal color-changing pigments for packaging. The Temperature-Sensitive index is related to the quality of pigments and is very important in the industry. Details are as follows.

This thermal color-changing pigment is sensitive to temperature changes. When it is in a specific temperature range, its color changes significantly. This characteristic is derived from the delicate chemical structure and physical properties. The molecular structure is rearranged and combined when the temperature changes, resulting in changes in light absorption and reflection characteristics, and the color change is immediately apparent.

Temperature-Sensitive index has the initial color change temperature. This is the temperature at which the pigment begins to exhibit color change. It is of great significance to accurately control the initial discoloration temperature. In packaging application scenarios, if the packaging is used for food preservation, the initial discoloration temperature needs to conform to the appropriate temperature range for food preservation. If the initial discoloration temperature is too low and the food is still in a normal storage state, the pigment will have changed color, which is easy to cause consumers to misjudge the quality of the food; if the initial discoloration temperature is too high, the pigment will not change color when the food deteriorates, and it will not be able to provide consumers with timely warnings.

The temperature range of discoloration is also critical. This is the temperature range that the pigment goes through from the beginning of discoloration to complete discoloration. A narrow discoloration temperature range can make the color change more acute and clear. For example, in cosmetic packaging, consumers expect to know precisely whether the product storage ambient temperature is If the color change temperature range is too large, the color change may be blurred and difficult to identify, making it difficult to provide consumers with accurate information.

And the color change recovery is also an important consideration for Temperature-Sensitive. After the color change of the pigment is caused by the temperature change, when the temperature returns to the initial state, it needs to be able to quickly and accurately return to the original color. This feature is particularly critical for packaging materials that are reused. For example, the logistics turnover box will go through different temperature environments during multiple transports. If the pigment cannot recover well after the color change, the turnover box will not be able to accurately reflect the temperature situation with the color change next time it is used, which will affect its function.

In addition, the color stability of pigments is correlated with the Temperature-Sensitive index. Even if the color changes due to multiple temperature changes, the color stability needs to be guaranteed. Otherwise, the color is distorted after multiple color changes, and it is difficult to accurately judge the temperature according to the color change.

Jianfeng Chemical Production Plant attaches great importance to the Temperature-Sensitive index of thermal color-changing pigments for packaging. From raw material selection, production process control to finished product testing, it strictly follows the standards, and strives to produce pigments that perform well on this indicator to meet the stringent needs of various industries for thermal color-changing pigments for packaging, adding practical and unique temperature indication functions to product packaging.

Ceramic Pigments for High Temperature Applications: Durability Challenges

Our factory Jianfeng Chemical specializes in chemical production for a long time. In the ceramic pigment industry, I have been studying for many years, and I know that under high temperature applications, there are many problems in its durability. I will describe it in detail today, and hope that the same industry will learn from it.

Ceramic pigments are used in ceramics fired at high temperature. They are colorful and enhance their beauty. However, the high temperature environment is harsh, which tests the durability of pigments greatly. The first to bear the brunt is the chemical change caused by high temperature. The kiln fire is raging, and the temperature rises sharply. The chemical components in the pigments may react, causing color changes. For example, some metal oxide pigments may be oxidized at high temperature, and the valence state changes, and the color changes. The bright color of the past, baptized by high temperature, or dull, is a challenge to the chemical stability of pigments.

Furthermore, the difference in thermal expansion coefficient is also a serious problem. If the thermal expansion coefficient of the ceramic body and the pigment does not match, the degree of shrinkage of the two will be different when cooled after high temperature firing. Under the action of this stress, the pigment may fall off from the body, or cause surface cracking. Looking at ancient porcelain works, the occasional peeling of the pigment is mostly due to this. Therefore, it is crucial to find a pigment formula that matches the thermal expansion coefficient of the ceramic body.

In addition, the complex atmosphere in the kiln also affects the durability of the pigment. Oxidation and reduction atmospheres alternate, and some pigments are sensitive to it. In an oxidizing atmosphere, certain elements are easily oxidized, and in a reducing atmosphere, or are reduced, and the color is therefore fickle. Therefore, precisely controlling the atmosphere in the kiln is a key measure to ensure the color stability and durability of pigments.

In order to deal with all kinds of challenges, our factory studies day and night. Since the selection of raw materials, we strive to be pure and high-quality, and reduce the disturbance of impurities on the performance of pigments. Formulation adjustment also spares no effort to test the ratio of various elements, hoping to obtain the best formula for excellent chemical stability and thermal expansion coefficient. In the firing process, we carefully study the changes in temperature, time and atmosphere, and carefully adjust them to make the pigments play the best performance.

Although there are many challenges, Jianfeng Chemical of Ranwu Factory adheres to ingenuity and unremitting exploration. With time, we will be able to overcome the problem of durability of ceramic pigments for high temperature applications, add luster to the color of ceramics, and pass it on to future generations, forever shining.

Advanced Synthesis of Organic Pigments: Environmental Protection Pathways and High-Yield Strategies
I am the workshop of Jianfeng Chemical Industry. Today, it is a wonderful method for the synthesis of organic pigments, which is the key to environmental protection and high yield.

Organic pigments are widely used in various industries and lives. The splendid painting, the colorful dyeing and weaving, and the dazzling packaging all depend on their contributions. However, the synthesis methods of the past have much to discuss. There are those who consume a lot of energy, those who pollute the environment, and those who have not improved the yield. Today is different from the past. We should seek advanced synthesis paths to meet the needs of the times.

Let's talk about environmental protection paths first. In the past, synthesis often used harmful solvents and reagents. Such as halogenated hydrocarbons, although it is easy to react, its toxicity and refractory degradation are a serious environmental hazard. Today, we strive to replace them with green solvents. Water and ionic liquids are both good choices. Water, from pure to pure, can be taken infinitely, and is harmless to use. Ionic liquids have unique properties, can be recycled, and have synergistic power in many reactions.

Furthermore, the choice of catalyst is also important. Traditional metal catalysts have many residual risks, affecting the quality of pigments and polluting the environment. Today, we should seek new catalysts that are efficient and environmentally friendly, such as enzyme catalysts and solid acid catalysts. Enzymes are the essence of biology, with strong specificity, mild reaction conditions, and no pollution. Solid acid catalysts are easy to separate, reusable, and environmentally friendly.

As for high-yield strategies, the first step is to optimize the reaction conditions. Temperature, pressure, and the proportion of reactants all need to be carefully controlled. If the temperature is too high, it may cause side reactions to cluster; if it is too low, the reaction will be slow and the yield will not be high. The same is true for pressure. Appropriate pressure can make the reaction proceed in a favorable direction. The proportion of reactants also needs to be weighed. Excessive or insufficient is not a good strategy.

The improvement of reaction equipment is also the key to high yield. New reactors, such as microreactors and continuous flow reactors, can precisely control temperature and flow, making the reaction more uniform, reducing side reactions, and increasing yield. Micro-reactor, small size, high heat and mass transfer efficiency, can make the reaction completed instantaneously, and can be operated in parallel, greatly improving production efficiency. Continuous flow reactor, continuous flow of materials, continuous reaction, avoiding batch differences, product quality is more stable.

Simplification of synthesis steps is also the key. The lengthy steps are not only time-consuming and laborious, but also each step has losses, resulting in reduced yield. Therefore, when striving for a simple synthesis route, get the most products with the least steps.

Jianfeng Chemical's workshop must adhere to the concept of environmental protection and high yield, and study the new method of organic pigment synthesis. We are willing to work with you to create a new frontier for the industry of organic pigments, making the color of pigments brighter and purer, and achieving stability and long-term success in environmental protection and high productivity.