Taiwanese-produced tungsten oxide (blue) for optical lenses (BTO)
High-purity BTO contributes to the improvement of lens coloring and optical properties.
In the optical lens industry, precise control of light transmittance and refractive index is required. Particularly for lenses with special optical properties, the selection of coloring materials is crucial, as optimizing light absorption and scattering significantly affects the performance of the lens. Inappropriate coloring materials can lead to a decline in lens performance and unwanted light reflection. Our tungsten oxide (blue) (BTO) presents a metallic blue color and contributes to enhancing the optical properties of lenses as a coloring agent for glass. 【Application Scenarios】 - Coloring of optical lenses - Adjustment of light transmittance - Control of refractive index 【Effects of Introduction】 - Improvement of lens optical performance - Vivid color reproduction - High durability
basic information
【Features】 - Deep blue to blue-black powder - High purity (99.95% or more) - Excellent optical properties - Ideal as a coloring agent for glass and ceramics - Produced in Taiwan 【Our Strengths】 Kowa Co., Ltd. is a company with a history of over 130 years, founded in 1894. We combine trading company functions with manufacturing capabilities and engage in a wide range of businesses. The Inorganic Materials Division acts as an agent for distinctive domestic and overseas raw materials, providing products tailored to our customers' needs.
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Applications/Examples of results
Negative electrode materials for lithium-ion batteries, gas sensor materials, electrochromic devices, precursors for the reduction of tungsten metal powder, inorganic pigments and colorants (for glass, ceramics, enamels, etc.), photocatalysts and photoresponsive materials, thermal shielding and infrared absorbing materials (for construction materials and automotive applications, etc.), functional coating materials (conductive films and ESD protection), ceramic raw materials, conductive materials for electronic components.
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Kowa Co., Ltd. is a company with a history of over 120 years, founded in 1894 as a cotton fabric wholesaler. As the core company of the Kowa Group, it has both trading functions for the import and export of textiles, machinery, building materials, and trilateral trade, as well as manufacturing functions for pharmaceuticals, medical devices, vision units, energy-saving, and energy-creating related products, covering a wide range of business fields. One of its divisions, the Kowa Resource Materials Department, Inorganic Materials Section, engages in wholesale business for the import and export of raw materials and also acts as a sales agent for distinctive domestic and overseas raw materials.

















































