Indium Paint　Eco Mirror 49

What is the Indium Paint（ECO MIRROR 49）?

　Indium in indium paint is a rare metal with atomic number 49 and the element symbol "In. It is a soft, silvery blue-white metal that is stable at room temperature. Once produced in Japan, it is now almost exclusively imported from China.
　The name "indium" is said to have originated from the color indigo blue in the emission spectrum. It is an easy-to-handle metal with a low melting point, conductive and permeable, and its thin film has rare characteristics in metallic coatings of transmitting millimeter waves, etc. It is processed for coating and made into indium paint (ECO MIRROR 49).

※ECO MIRROR 49 is a registered trademark of Musashi Paint Holdings Co, Ltd.

Why indium coating now?

Increasing demand for mass production of plating coatings

　The plating-like coating had been converted to film by obtaining technological advancements such as silver colloids, complexes, and plating. Conventional plating coatings are inferior in terms of weather resistance and corrosion resistance, and with the recent advancement of equipment components, the demand for mass production to address environmental issues has increased more and more. Therefore, in order to apply the characteristics of indium coating to equipment parts, a paint manufacturer and an engineering company jointly developed a new method of mass-producing plating-like coating by spray painting. We have perfected a production system using spray that demonstrates the design and functionality of indium paint.

Indium coatings to meet advanced coating requirements

Functional coating　Millimeter wave transparency

　Indium paint forms a stripe structure film. The coating film is permeable to radio waves and, by ultra-thinning with R technology, is resistant to degradation of radio wave (5G, millimeter wave) characteristics used in smartphones, productized appliances, and automotive electronic components.

Thin-film coating technology　R technology

　The key to indium coating is the R technology. Thin-film multiple coatings are key to the performance of indium coatings. “R technology,” which allows adjustment of film thickness, leads the indium film to a high-performance film, completing the plating-like coating by spray painting.

A wide variety of design coatings

　Indium coating by spraying is richly expressive.
　It enables a variety of expressions such as matte, piano black, etc.

Can be compatible with all types of materials.

　Indium paint is compatible with all types of materials.
　Undercoating improves the adhesion of indium paint.

Indium coating process

The basic process of the indium coating system is 3 coats and 3 bakes. It is also possible to change to 4 coats, etc., depending on the material and design requirements.

　【　Under coat → bake → Middle coat (indium coating) → bake → Top coat → bake　】