When you think of paint, you probably picture colour, finish, maybe durability. But behind the scenes, paint is full of tricks and tales that few people know. Paint has carried science, history, and even space-age technology into our homes and public spaces. Below are four fascinating (and little-known) facts about paint — read on, and you’ll never look at a paintbrush the same way again.
1. Paint that cleans the air
Yes — there are paints out there that don’t just sit on your wall; they actively break down pollutants in the air. These are sometimes called self-cleaning or photocatalytic paints. When exposed to sunlight (or UV light), nanoparticles of titanium dioxide in the paint act as catalysts, generating reactive molecules (like hydroxyl radicals) that neutralise organic pollutants and break them down into less harmful substances like water and CO₂. (technologynetworks.com)
In effect, your wall becomes part of an air-purifying system. Some commercial paints using this technology already exist (for example, Boysen KNOxOUT in Asia), which claim to reduce nitrogen oxides and VOCs around the wall surface. (knoxoutpaints.com)
For households and businesses, that’s a bonus — your walls can help keep the indoor air fresher and purer, in addition to looking stylish.
2. Pigments once more valuable than gold
Back in art history, some pigments were so rare and difficult to produce that they cost more than precious metals. One famous example is natural ultramarine, made from the semi-precious stone lapis lazuli. The process of crushing and purifying the blue pigment was laborious, and artists often reserved ultramarine for the most important elements in a painting (such as robes of holy figures). In some times and places, ultramarine was literally priced on par with gold. (en.wikipedia.org)
Because of its cost, painters would sometimes underpaint with a cheaper blue and overlay only the visible parts with ultramarine. The prestige associated with ultramarine (called “beyond the seas,” because it was imported) made it a symbol of wealth and devotion. (artsandculture.google.com)
So next time you pick a blue paint, remember: centuries ago that pigment might’ve bankrupted an artist.
3. Glow-in-the-dark paint: space, safety, and sustainability
The notion of paint that glows in the dark sounds like science fiction — but it’s very real, and used in all kinds of practical contexts, including space. Modern photoluminescent pigments (often strontium aluminate doped with rare earth elements) absorb light during the day and then slowly emit it in darkness. One brand, Super-LumiNova, is common in watch dials, safety signage, and architectural renderings. (en.wikipedia.org)
NASA and aerospace designers have used glow-in-the-dark coatings for emergency escape routes, spacecraft interior markings, and instrument panels — anything that needs to remain visible when normal lighting could fail. Because these pigments don’t rely on electrical power, they are inherently safer and more durable in critical environments.
In your home or business, using a phosphorescent paint for stair edges, exits, or hallways could provide a built-in, power-free safety glow — especially when everything else is dark.
4. The world’s priciest paint: diamonds in the mix
If you want bling on your wall, there is paint for that — and it comes at a cost. One of the most luxurious modern decorative paints incorporates crushed diamonds (or diamond dust) into its formula. This gives surfaces a unique sparkle and depth unmatched by standard metallic or glitter finishes. While such premium paints are niche, they demonstrate how far paint technology and materials have evolved — from cave walls and crushed minerals to dazzling, high-end finishes.
Artists and bespoke manufacturers pushing the boundaries of premium coatings sometimes use exotic particles — including diamond, shell, or minerals — to create visual effects that are both stunning and expensive. (Such extreme decorative paints are rarely cheap, but they make a dramatic statement.)
These more futuristic paints are still more “wow” than “warehouse,” and you won’t find them readily on South African shelves…but who knows? The way paint technology is moving, today’s novelty could be tomorrow’s normal. One thing’s for sure — when the future of colour arrives, we’ll be ready with a brush in hand!
