YAMAGUCHI MICA CO., LTD.    
<PRODUCT> MICA POWDER for GENERAL USE


Wet-ground Mica Powder AB-25S
Multi-purpose mica powder which is used for diverse applications.
For example, in plastics, paint and rubber and molding release, etc.

Two types are available: High-performance wet-ground mica and
cost-effective dry-ground mica.

Tripatite trade is available for made in India products.
Wet-ground Mica Powder by YAMAGUCHI process
This series is high performance mica powder that realizes smooth and thin scale-like particles with high aspect ratio using a
grinding machine uniquely developed by Yamaguchi Mica Co.,Ltd. It produces effects that the any other makers have never
effectuated. Pure Indian muscovite which contains much more fully-grown crystals is used as the material and is processed
with our high-level refinement and iron removal methods that guarantee the quality of our products.
Product Name Average
Particle Size
(μm)
Bulk
Density
(g/ml)
Loss on
Drying
(%)
Aspect
Ratio
(Ref. value)
Remarks
A-11 3 0.11 1.0 -  Ultra-finest particle, 1,000Mesh
A-21S 23 0.13 0.5 70  Muiti-purpose, 325Mesh
AB-25S 24 0.17 0.4 80  High-performance, 325Mesh
J-31M 35 0.18 0.4 75  Muiti-purpose, 200Mesh
Wet-ground Mica Powder by MEDIA MILL process
This grade is ground by a media mill machine, which is suitable for mass production. Pure Indian muscovite which contains
much more fully-grown crystals is used as the material and is processed with our high-level refinement and iron removal
methods that guarantee the quality of our products.
Product Name Average
Particle Size
(μm)
Bulk
Density
(g/ml)
Loss on
Drying
(%)
Aspect
Ratio
(Ref. value)
Remarks
SYA-21R 27 0.21 0.5 -  Indian-made product, 325Mesh
Microparticulate Mica Powder by HYBRID process
Fine-ground mica powder that has been finished by a wet-grinding machine and then re-ground by a dry jet mill.
Thinning and impurity reduction compared to those produced by dry grinding. It is used as a high-performance, high-quality
particulate mica powder, especially for plastics and paints that require a good appearance.
Product Name Average
Particle Size
(μm)
Bulk
Density
(g/ml)
Loss on
Drying
(%)
Aspect
Ratio
(Ref. value)
Remarks
SJ-005 5 0.15 1.0 -  Ultra-fine particle, 1,000Mesh
SJ-010 10 0.15 0.8 -  Ultra-fine particle, 500Mesh
Dry-ground Mica Powder
This is generally manufactured at lower cost due to high productivity using simple process comparing to the wet-ground
mica. Our line up is the large particle size for plastics and friction materials.
Product Name Average
Particle Size
(μm)
Bulk
Density
(g/ml)
Loss on
Drying
(%)
Aspect
Ratio
(Ref. value)
Remarks
B-82 180 0.25 0.2 100  Mostly used in filler for plastic, 32Mesh
SB-061R 130 0.27 0.3 -  Indian-made product, 60Mesh

*The values above are representative values and not for use as specification.
*'Average Particle Size' shows volume-average diameter analyzed by laser diffraction/scattering method.

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