The use of titanium dioxide pigment in paper manufacturing, especially in coated paper and coated paper, does have a significant impact on the durability of paper. The quality of titanium dioxide pigments, especially its granularity, dispersibility and surface treatment, will directly affect the durability, gloss, ultraviolet resistance and weather resistance of paper.

The Whiteness and Color Stability of Titanium Dioxide  

High-quality titanium dioxide pigments has excellent whiteness and color stability. In the process of long-term storage of paper, if the whiteness of pigment is not enough or it is easy to change color, it will lead to yellowing and graying of paper. For example, in book printing paper, if the quality of titanium dioxide pigments is poor, with the passage of time, book paper will gradually lose its original white color, which will affect the reading experience.

The high-quality titanium dioxide pigments can still keep the white appearance of paper under the influence of light, air and other factors, because it has good resistance to harmful light such as ultraviolet rays and reduces the photoaging process of paper.

In Terms of Opacity and Hiding Power of Titanium Dioxide  

The opacity and hiding power of paper are also important for its durability. Titanium dioxide pigments with good quality can provide stable opacity and hiding power. In the paper used for documents and archives, if the opacity of the paper decreases, the text may appear through printing on the back of the paper, which will affect the readability of the document. Moreover, sufficient hiding power can prevent the exposure of fibers and other substances in the lower layer of the paper and reduce the erosion of the internal structure of the paper by external factors. For example, in outdoor poster paper, high-quality titanium dioxide powders can effectively block the infiltration of rain and dust into the paper, and prolong the service life of the paper.

Chemical Stability of Titanium Dioxide

The chemical stability of ti02 pigments will affect the durability of paper. If the pigment contains impurities or its chemical properties are unstable, it may react with other components in the paper (such as cellulose, additives, etc.). For example, some low-quality ti02 pigments may contain acidic or alkaline impurities, which will accelerate the acidification or alkalization of paper and lead to paper embrittlement.

However, high-quality titanium dioxide pigments is chemically neutral, which will not adversely affect the chemical environment of the paper, thus helping to maintain the strength and flexibility of the paper and extending the shelf life of the paper.

In Terms of Characteristics of Titanium Dioxide Particles  

The particle size and distribution of titanium dioxide pigments are also related to the durability of paper. If the particles are too large and unevenly distributed among the paper fibers, the paper surface will be uneven and the physical strength of the paper will be reduced. Moreover, uneven particle distribution may cause local weak links in the paper, which is easy to be damaged during use.

Titanium dioxide pigments with good quality, with fine particles and uniform distribution, can better fill the gaps between paper fibers, enhance the overall structure of paper, improve the physical properties of paper such as wear resistance and tear resistance, and make the paper more durable in the process of frequent use or long-term storage.