When you look for alternatives to Musou Black, you quickly run into bare percentages: 99.4 %, 99.9 %, 99.965 %. They look comparable, but they are not. Here we go through what the figures actually mean, which super-black suits which job, and what to check before ordering.
One number is not enough – and here is why
Light absorption is always stated at some wavelength and with some application method. Without those conditions the number is just a marketing figure.
Musou Black paint is a good example. The manufacturer's measurement curve (Total Hemispherical Reflectance, AOI 8°) shows the same paint as two different products depending on how it is applied:
- With an airbrush reflectance is about 0.6 % – that is, absorption 99.4 %
- With a brush reflectance is about 1.2 % – that is, absorption 98.8 %
The difference is twofold, and it comes purely from the working method. If you compare another product's sprayed figure with your own brushwork, you are comparing two different things.
The second condition is wavelength. Most figures are measured in the visible range, typically at 550 nm. That tells you nothing about how the material behaves in the infrared – and the difference can be dramatic. Flame-retardant Musou Black Fabric FR absorbs 99.8 % of visible light but reflects 46.6 % in the near infrared at 950 nm. Completely black to the eye, bright to machine vision.
From this follows a simple rule: always ask at what wavelength and with what application method the figure was measured. If the seller cannot answer, the figure is not comparable.
Which material suits which job
Musou Black is not one product but a family in which each member has its own task. The most common mistake is choosing the wrong product for the right job. In August 2026 the manufacturer supplied a measurement curve covering 250–2500 nm – from the edge of the ultraviolet, through visible light, into the near infrared. That makes comparison within the family meaningful for the first time, because all the figures come from the same measurement with the same method.
| Product | Visible light | Reflectance at 950 nm | For what |
|---|---|---|---|
| Musou Black paint | 99.4 % airbrushed 98.8 % brushed |
2.0 % | Paintable surfaces, scale models, set building, art, AV spaces |
| Fabric KIWAMI | 99.905 % reflectance 0.095 % |
37.7 % | The blackest in the family in visible light. Photography, exhibitions, studio backdrops |
| Fabric FR | 99.8 % | 46.6 % | Public spaces where fire test documentation is required |
| VL Flock Sheet | 99.7 % reflectance 0.3 % @ 550 nm |
10.0 % | Visible light. Tolerates contact |
| IR Flock Sheet | reflectance 0.3 % @ 550 nm | 0.3 % (250–2500 nm) | LiDAR, DMS/OMS, ToF cameras, machine vision, AOI inspection |
Reflectance at 950 nm is the figure that decides suitability for machine vision, LiDAR and other near-infrared sensors. A material that looks black in visible light can reflect tens of per cent there – the change does not come gradually but within a few tens of nanometres.
Manufacturer's note: the values are not guaranteed, and there can be slight variation between production lots. Figures marked with an approximation sign (≈) have been read from the manufacturer's measurement curve. If you are building a measuring instrument, ask us for the numerical values and lot data.
Three recurring selection mistakes
VL Flock Sheet near red light. VL performs excellently in visible light, but its reflectance rises steeply from about 700–750 nm. Near a red laser, red LED lighting or the NIR boundary it fails. That job belongs to IR Flock Sheet, whose curve stays flat.
Fabric FR for an infrared application. FR exists because of its fire test documentation, not because of infrared. Its 46.6 % reflectance at 950 nm makes it the wrong choice for machine vision – even though it looks just as black to the eye as the others.
KIWAMI on an optical bench with an NIR source. KIWAMI is the blackest in the family – but in visible light. Its reflectance rises steeply from about 800 nm, so it is just as wrong a choice for an NIR application as FR. This is the most insidious of the three, because KIWAMI is precisely the product whose figures look best.
Industrial ultra-black coatings
Search results also often bring up industrial optical coatings such as Vantablack. They are a different product category: they are sold to organisations on quotation for optics and aerospace applications, and you do not buy them online or apply them yourself. The right question is whether an available material is enough for your project – and usually it is.
If your object is not a paintable surface, a paint comparison will not solve your problem. Musou Black is also available as fabrics – fire-tested, contact-tolerant and infrared-optimised.
How to choose – four questions
- At what wavelength is the surface lit? Visible light, a red laser or NIR? This narrows the options fastest.
- Is the object a paintable surface or a textile? A curved, flexible or demountable structure favours fabric.
- Will anyone touch it? Super-black surfaces are sensitive to abrasion. There are dedicated products for contact tolerance.
- Is fire documentation required? Public spaces often require fire-tested materials. Fabric FR has test reports for curtain and drape standards, including EN 13773 (class 1) and NFPA 701. Final approval always rests with the local fire authority or the person responsible for the venue.
What to check before ordering
- Substrate. Non-absorbent surfaces need priming.
- No varnish. Varnishing destroys the absorption – a glossy surface reflects, whatever is underneath.
- Not for permanent outdoor use. The paint is designed for interiors.
- Storage 5–25 °C.
- The application method decides the result. If you are after that 99.4 %, it takes an airbrush and thin coats.
Summary
Comparing blackness percentages without the measurement conditions is misleading. Once you know the wavelength, the application method and the wear the object will face, the choice is usually easy – and often it is not the product with the biggest number in the brochure.
Dekoja.net is the official importer of Musou Black in Finland. The product pages carry the specifications for every material together with measurement conditions and sources, so you can make the comparison yourself.
Which black do you actually need? – compare all five with the manufacturer's data →