LOW-REFLECTANCE MATERIALS
Ultra-black & light-absorbing coatings
Coatings specified by reflectance rather than by colour. Used in optical assemblies, instrument interiors, sensor housings, camera and display components, stage and exhibition work, and design applications where a surface must read as absolute black.
TRADEMARK & SUPPLY CLARIFICATION
“Vantablack” is a branded technology family belonging to its owner and is not a generic term for any ultra-black coating. BADAR Trading does not represent or supply it. This page concerns commercially obtainable low-reflectance coating materials; the distinction is explained in our article on ultra-black availability.
How ultra-black materials differ from ordinary black paint
A conventional gloss black coating can still return several percent of incident light, and most of that return is specular — it produces visible highlights that reveal the form of the object. Low-reflectance coatings attack both parts of the problem: they increase absorption within the film, and they suppress the specular component so that what little light returns is scattered rather than mirrored.
There are three broad routes. Highly loaded carbon-based matte coatings are the most practical and the easiest to apply. Structured or textured surfaces trap light geometrically, multiplying the number of absorption events before a ray can escape. Engineered nanostructure approaches — vertically aligned carbon nanotube arrays being the best known — achieve the lowest reflectance but are process-grown on a substrate rather than brushed or sprayed, which limits where they can be used at all.
For a buyer this matters commercially: the lowest-reflectance technologies are frequently not purchasable as a coating in a tin, while very effective sprayable materials are. Specify the reflectance you actually need, over the wavelength band you care about, and the choice usually narrows quickly.
MATERIALS NAMED IN THE PUBLIC LITERATURE — INDUSTRY CONTEXT, NOT A BADAR PRODUCT LIST
Sources discussing this category consistently name a small set of obtainable materials: Acktar Black (an inorganic, industrial coating described by its manufacturer as absorbing across IR to UV and applicable to complex geometries), Musou Black and the Black 3.0/4.0 family (brush-applied, widely available), and Aeroglaze Z306 (long used behind space-based imaging sensors). A 2026 optical preprint measures several of these against a nanotube reference using bidirectional reflectance distribution functions rather than a single headline figure.
NAMED FOR ORIENTATION ONLY. WE DO NOT STATE THAT BADAR SUPPLIES ANY OF THESE PRODUCTS. REFLECTANCE FIGURES ARE QUOTED ONLY FROM MANUFACTURER DATA FOR THE GRADE OFFERED.
| ROUTE | HOW IT WORKS | PRACTICAL AVAILABILITY |
|---|---|---|
| Loaded matte coating | High pigment loading plus matting to suppress specular return | Sprayable or brushable; realistic for most projects |
| Structured surface | Geometry causes repeated absorption events before escape | Requires surface preparation or a textured substrate |
| Grown nanostructure | Aligned nanotube forests absorb across a wide band | Process-applied to a part; not a general-purpose coating |
Specify the requirement, not the superlative
“The blackest” is not an engineering specification — a headline absorption figure says nothing about wavelength band, angle, test method or substrate, and the material with the better number is often the one you cannot apply to your part. Four things make an enquiry answerable in one exchange. Why the headline figures mislead.
Reflectance target
The figure your design requires, and over which wavelength range.
Substrate and geometry
Material, size, internal surfaces, tolerance for film build.
Environment
Vacuum, outgassing limits, temperature, handling and cleaning.
Quantity and cadence
Prototype quantity versus production, and whether supply must repeat.