"" Sol Black "is a black plating technology performed by electroless plating.

Only the inner diameter of pipe cylindrical parts can be plated.

Gives a matte dark black film.
No environmentally regulated substances are used. (RoHS compliant product)

2017 "Kansai Monozukuri Shinsen Award"
2018 "Kyoto SME Excellent Technology Award"
2019 "Japan Vacuum Society Industry Award"
received.

It is used as a shading plate for the large low-temperature gravitational wave telescope "KAGRA".

By depositing a black plating film with a special shape on the surface, it shields excess scattered light that becomes noise and plays a role in improving the detection ability (sensitivity) of gravitational waves.

Maximum size that can be processed: 800 x 800 x 400, up to 50 kg

<Features >
-It has a complicated surface shape and excellent light absorption performance.
-The matte black color does not reflect light.
-It generates less outgas and is ideal for use in vacuum.
-Has more corrosion resistance than electroless nickel plating.
-Excellent in heat resistance and UV resistance.
-Since it is an electroless plating method, the film thickness is equal, and it is possible to process complicated shapes and inner diameters.
-No environmentally regulated substances such as hexavalent chromium are used.
* Since the coating film structure is complicated, the plating film easily falls off, making it unsuitable for friction and sliding environments.

<Characteristic >
● Light absorption: Absorbs 98% of light in the visible light region (380 to 750 nm) on average.
● Low reflection: The specular reflectance of visible light emitted at an incident angle of 12 ° is 0.2%.
● Vacuum: The gas release rate is about an order of magnitude lower than that of Foss Black III.
● Corrosion resistance: In the corrosion test under artificial acid rain (JIS H8502),
It is superior to electroless nickel plating.
● Heat resistance: The reflectance does not change even if it is held at 200 °C for 2 hours.
● Precision: Uniform film formation is possible for all shapes. (± 20% of specified film thickness)
● Materials: Various materials can be processed. Please contact us for details.

<< Main uses >>
・ Gravitational wave telescope (KAGRA)
・ Optical parts such as optical telescope (HONIR)
・ Heat dissipation parts * Good even in an ultra-low temperature environment (-253 ℃). "