1. TOP
  2. TOP
  3. Products
  4. Paint / Ink

Paint / Ink

Summary of uses

Cray (smectite), which has excellent swelling and thickening properties and thixotropy, is used as a thickening and gelling agent in a wide range of products including water-based paints and inks. Clay consists of completely inorganic colloid particles and thus is hardly susceptible to microbial decomposition or degradation due to temperature changes.
We provide refined bentonite as the KUNIPIA Series, and synthetic smectite that is highly transparent when dispersed in water as the SUMECTON Series. These products are used in various kinds of paint to improve their film-forming property and spreadability and to prevent dripping.

Expected effects

Prevention of settling and dripping

Glass beads
Glass beads(Example of preventing sedimentation)
Sumecton-SWN 2% dispersion

Our products can be used in paint or ink to prevent it from dripping or the pigment from settling or as a viscosity stabilizer.

Recommended products

Water based KUNIPIA Series, SUMECTON Series
Solvent based KUNIVIS Series, SUMECTON Series(Organized)

Improvement in spinnability

Our products can be used in combination with sodium polyacrylate, CMC, or other water-soluble organic polymers to reduce their spinnability and fine-tune their fluidity.

Recommended products

Water based KUNIPIA Series, SUMECTON Series
Solvent based KUNIVIS Series

Improvement in gas barrier property

AFM image of Montmorillonite
AFM image of montmorillonite
Crystal size of Montmorillonite
Crystal size of Montmorillonite

Montmorillonite has a flat plate crystal structure with a high aspect ratio, and it laminates by applying coating liquid. Expecting that the laminations produce a labyrinth structure which can be improved gas barrier property including water vapor. Furthermore, it has flame retardancy, heat resistance as delivered from inorganic mineral. New effects can be provided as a functional additive.

Recommended products


Product lineup

※Flick left or right to view.
Product name Category Suitable primary dispersing medium
KUNIPIA-F Refined bentonite Water
KUNIPIA-G Refined bentonite Water
KUNIPIA-G4 Refined bentonite Water
SUMECTON-SA Synthetic saponite Water
SUMECTON-ST Synthetic stevensite Water
SUMECTON-SWN Synthetic hectorite Water
SUMECTON-SWF Synthetic hectorite Water
KUNIVIS-110 Organic bentonite Low- to moderate-polarity organic solvent
KUNIVIS-127 Organic bentonite Low- to moderate-polarity organic solvent
SUMECTON-SAN Organic synthetic hectorite Low- to moderate-polarity organic solvent
SUMECTON-STN Organic synthetic hectorite Medium- to high-polarity organic solvent
SUMECTON-SEN Organic synthetic hectorite High-polarity organic solvent



Is there a way to use your products in combination with a water-soluble organic polymer?


One way to use our products in combination with a water-soluble organic polymer is to separately produce a water dispersion for the water-soluble organic polymer and that for KUNIPIA (SUMECTON) and stir both water dispersions until they become uniform. The compounding ratio and other parameters need to be adjusted in accordance with the viscosity and fluidity you require.


Please tell me how to select between KUNIPIA and SUMECTON.


Compared to KUNIPIA, SUMECTON is characterized by a high-transparency water dispersion and a high viscosity imparting effect. We recommend using SUMECTON for applications that place importance on transparency.


Please tell me how to disperse your products.


They can be dispersed with a general propeller stirrer. We recommend using a machine with high shear, such as a homomixer, when using a with a high concentration. In addition, undispersed microflocs may remain, and we therefore recommend that you use the product after allowing it to stand for one day after dispersion.
We also recommend that the product should not be dispersed in another raw material or mixed solvent but should be dispersed in a recommended solvent and then other solvents and raw materials should be added to it.