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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.