The titanium dioxide used in ink typically needs to meet a series of specific requirements to ensure its performance and application in the ink. Here are some common requirements for titanium dioxide used in ink:

1. Color and Whiteness: Titanium dioxide for ink should have high whiteness to ensure that the ink mixture achieves the desired color effects.

2. Particle Size: The particles of titanium dioxide should be moderate to ensure good dispersibility and stability. Appropriate particle size also contributes to the glossiness and printing quality of the ink.

3. Dispersion: Titanium dioxide should be easy to disperse in the ink, ensuring uniform distribution and preventing aggregation.

4. Chemical Stability: Titanium dioxide for ink should exhibit good chemical stability to avoid adverse reactions or instability in the ink.

5. Lightfastness: Titanium dioxide needs to have a certain level of lightfastness to ensure the stability of color when the printed material is exposed to light.

6. Heat Stability: Particularly under high-temperature conditions, titanium dioxide for ink should have good heat resistance to prevent color changes or degradation.

7. Adaptability to Different Printing Processes: Titanium dioxide for ink needs to adapt to different printing processes such as offset printing, gravure printing, silk screen printing, etc., to ensure the stability of printing effects and performance.

8. Compatibility with Printing Inks: Titanium dioxide should be compatible with the components of the ink, ensuring good affinity and preventing precipitation or other adverse effects.

These requirements help ensure that titanium dioxide for ink performs well during the printing process, providing high-quality printing results while maintaining the stability and durability of the printed material.