Ink

How Hydrous Kaolin Improves Ink Opacity, Flow, and Print Quality

Hydrous kaolin, also known as China clay, is commonly used in ink production as a cost-effective filler and extender. It enhances the opacity and coverage of inks, allowing for better application while reducing the need for multiple layers. This makes it ideal for matte or satin finishes, often used in packaging, magazines, and general-purpose printing.
Its fine particle size ensures smoothness and consistency in the ink, improving flow properties and making the application easier and more uniform. Hydrous kaolin also aids in ink absorption, improving print sharpness, reducing smudging, and contributing to quicker drying times.

Hydrous Kaolin in Ink

Function
  • Filler and extender for opacity, smoothness, and cost-efficiency.
Key Properties
  • Opacity & Coverage: Improves ink opacity, reducing the need for multiple layers.
  • Cost-Effective: Adds volume, reducing ink costs.
  • Finish: Provides matte or satin finishes (ideal for packaging, magazines).
  • Printability: Improves absorption, sharpness, and drying time.
  • Eco-Friendly: Non-toxic, safe for food packaging and children's products.
Common Uses
  • Standard, cost-effective inks (e.g., matte inks for packaging, newspapers, general printing).

Calcined Kaolin in Ink

Function
  • Pigment and filler, enhancing performance, gloss, and durability.
Key Properties
  • Opacity & Whiteness: Increases brightness and opacity, especially in light-colored inks.
  • Gloss: Contributes to a glossy, reflective finish.
  • Durability: Improves abrasion resistance, ideal for high-wear applications.
  • Adhesion: Enhances ink adhesion to various substrates (paper, plastic, metal).
  • Viscosity: Acts as a rheological modifier to control ink flow.
Common Uses
  • Premium, high-gloss inks (e.g., packaging, labels, high-end magazines, industrial printing).

Conclusion

  • Hydrous Kaolin is suited for standard inks, focusing on opacity, cost-effectiveness, and smooth finishes.
  • Calcined Kaolin is used in premium inks, emphasizing gloss, durability, and superior print quality.