Musou Black – super-black paint, absorbs up to 99.4% of light

Imagine the moment an object disappears in front of your eyes. Musou Black is a Japanese, light-absorbing, water-based super black paint: it absorbs up to 99.4 % of visible light and turns a surface into optical "black hole" darkness. A painted object looks almost two-dimensional: shadows vanish and the eye cannot find the shape.

In brief

• Made in Japan – manufacturer Koyo Orient Japan
• Absorbs up to 99.4 % of visible light (550 nm, airbrushed) – 98.8 % by brush
• Odourless and water-based: VOC < 1 %, tools clean with water
• No special equipment: applied with an ordinary brush or airbrush
• Yield: approx. 0.9 m² / 100 ml by brush, approx. 0.64 m² / 100 ml by airbrush
• Drying: touch dry 15–30 min, fully cured 24 h
• Available in: 100 ml and 1 l from stock, 15 l to order
• Dispatched in 1–3 working days from our own warehouse in Finland – shipped within the EU, no customs or import charges
• Official importer and Official Distributor in Finland

What Musou Black is made for

An emptiness that makes you look

The depth of Musou Black is on a par with gallery installations and film sets. The work appears to float, and the viewer keeps staring.

The secret weapon for scale models

Two thin coats and the shadows disappear into infinity. A diorama stands out in competition because the black is actually black.

A contrast jump for home cinema

Spray frames or speaker grilles: the edge of the projector beam disappears and image contrast rises visibly.

A studio without solvent fumes

The water-based formula means practically no odour and 30-minute drying. The crew will thank you for the clean air.

How to get the best result

1. Prepare non-absorbent surfaces. Smooth plastic, metal and glass should be lightly scuffed and primed with a thin black primer. Primer evens out absorption and saves Musou Black.
2. Apply two thin coats. One coat covers, but two thin coats produce the real super black. A third coat maximises the effect under very bright studio light.
3. An airbrush gives the most even finish. The manufacturer recommends an airbrush. Consumption is roughly 1.4× that of a brush, so plan your quantity accordingly.
4. Do not varnish. A protective lacquer destroys the effect – the light-absorbing powdery surface is the whole point. The surface therefore stays delicate to the touch.

Need the tools? See painting supplies: safety glasses, work gloves, respirators and masking tapes.

Choose the right application

Because of the powdery light-absorbing layer, the mechanical strength of the coating is low. On surfaces exposed to repeated stress the coating can come off or scratch, and the painted surface can shrink and crack. Musou Black is a specialist product for accent surfaces, art and light control – not an ordinary hard-wearing interior paint.

Musou Black and industrial ultra-black coatings

Many people reach this page while looking for information on industrial ultra-black coatings such as Vantablack. They are a different product category: Vantablack is an industrial optical coating from Surrey NanoSystems, sold to organisations on quotation for applications such as space, sensors and optics (manufacturer's contact page). Musou Black is a water-based acrylic paint that you can buy on this page and apply yourself with a brush or an airbrush.

The numbers are not directly comparable. Every manufacturer measures with its own method: wavelength range, angle of incidence, substrate and number of coats all differ. The 99.4 % figure for Musou Black was measured at 550 nm with airbrush application.

When Musou Black is the right choice

• Shipped from within the EU. Dispatched in 1–3 working days from our warehouse in Finland – no customs, no import charges, no weeks of waiting on a non-EU parcel. We are the official importer of Musou Black and the manufacturer's appointed distributor in Finland.
• Water-based and odourless. VOC below 1 %, tools clean with water. Suitable for interiors, studios and educational use without dedicated ventilation.
• No special equipment or application engineering. A brush is enough to start.
• The whole material family from one source. If paint is not the right form for your project, the same factory makes the fabrics: KIWAMI (99.905 %), Fabric FR with fire-test documentation and IR Flock Sheet for near-infrared and LiDAR.

And when it is not. If you need documented optical performance for a precision instrument, a wear-resistant surface, or reflectance below 0.1 %, tell us. We will point you to the right material or to another supplier – we do not sell the wrong product for the sake of a sale.

Technical information

• Type: water-based acrylic (synthetic resin) paint, VOC < 1 %
• Light absorption: ≤ 99.4 % @ 550 nm (airbrush) · 98.8 % by brush
• Coverage: approx. 0.9 m² / 100 ml by brush · approx. 0.64 m² / 100 ml by airbrush
• Drying time: touch dry 15–30 min, fully cured 24 h
• Lightfastness: ASTM class II
• Ingredients: synthetic resin (acrylic), pigment, antifungal agent, water
• Applications: plastic models, scale models, fabrics, interior surfaces, set design, optical and AV projects
• Storage: 5–25 °C, protect from freezing
• Sizes: 100 ml, 1 l, 15 l (ask for a quote on 15 l containers)

Frequently asked questions

Is Dekoja.net an official importer?

Yes. Dekoja.net is the official importer of Musou Black products and Koyo Orient Japan's appointed distributor (Official Distributor) in Finland. You will find us on the manufacturer's own Distributors page. In practice this means the origin of the products is verified, and we have the manufacturer's technical support and documentation available even for demanding projects.

Is this the same thing as Vantablack?

No. Vantablack is an industrial optical coating from Surrey NanoSystems, sold to organisations on quotation. Musou Black is a Japanese water-based acrylic paint that you can buy on this page and apply with a brush or an airbrush.

Is Musou Black the world's blackest paint?

We don't claim that. Figures for black paints cannot be compared directly, because manufacturers measure them in different ways. The manufacturer's stated absorption for Musou Black is 99.4 % (550 nm, airbrushed), and a few competing paints state higher figures using their own measurement methods. Musou Black's strengths are the measured 99.4 % performance, the water-based formula, easy application and fast dispatch from the EU.

Does Musou Black adhere to plastic?

Yes. Smooth plastic should still be lightly scuffed and primed with a thin black primer, because non-absorbent material may require surface preparation before application. Priming secures adhesion and saves paint.

Will the paint stay on if the structure flexes in use?

On a flexing structure the risk of cracking is real. Applied in thin coats the paint tolerates movement clearly better than a thick layer, but strong bending can crack the surface. Paint for rigid parts, fabric for flexing parts is often the safer solution.

Should the painted surface be sealed or varnished?

No. A protective lacquer destroys the super black effect, because the powdery light-absorbing surface is the whole point. The surface is ready as soon as it dries, but stays delicate to touch and abrasion.

How much paint does an airbrush use?

With an airbrush coverage is about 0.64 m² / 100 ml, roughly 1.4× the consumption of a brush (0.9 m² / 100 ml). The manufacturer recommends an airbrush because it gives the most even and blackest result.

How many coats are needed?

Two thin coats produce the real super black. One coat already covers well, and a third maximises the effect under very bright studio light. A thin coat always beats a thick one.

Can Musou Black be used outdoors?

Yes, but a bare painted surface can fade in sunlight and does not withstand mechanical wear. Outdoor use suits short-term projects such as event set design, not permanent weather-exposed surfaces.

Can you paint a car with Musou Black?

For show and camera cars yes, for a daily driver no. The result is astonishing, but the coating scratches in traffic use and cannot be protected with lacquer. Wheels, interior panels and details are safer targets.

Should I choose the paint or the fabric?

Paint suits three-dimensional objects and fixed surfaces. The fabrics are blacker (99.8–99.9 %) and handle contact better, so for backdrops, curtains and studio use choose KIWAMI fabric.

Is primer needed?

On porous surfaces a thin black primer evens out absorption and saves Musou Black. On non-absorbent surfaces primer is practically essential for good adhesion.

See and read more

In the video below a room is painted black with Musou Black, creating what looks like a gateway into another dimension.

Read the artist's article Picturesque Musou Black on our blog, as well as Tekniikan Maailma's article (in Finnish) about a car that was painted to look like a sparkling night sky.

Visible light reflectance comparison

The table compares how Musou Black materials reflect light when it hits the material at an 8-degree angle. The lower the value, the more matte and the blacker the material. This matters especially in optical applications and when assessing a material visually.

Which black do you actually need? Compare all five materials →

We also sell to businesses. Request a quote or a demo of Musou Black paint.