Sérum 1.47 is tuned to the refractive index of glass. Dip the pipette in and it vanishes. On skin it does the same: no film, no shine.*
*Concept claim, fictional brand. Click anywhere on the wall to drop a ripple.
01 · THE INDEX
A glass rod vanishes in a liquid of the same index.
Light bends whenever it crosses from one material into another. Make two materials bend it by exactly the same amount and the boundary between them stops existing, optically speaking. Pyrex in glycerin is the classroom version. We tuned our serum to n = 1.47 so it does the same on skin: it's there, and you don't see it.*
Bottle4 mm flint glass. Polished window at the front, satin-etched at the back, so the serum glows.
Base12 mm of solid glass with a lens ground into it. VITRÈNE is engraved inside.
Pipetteborosilicate, n 1.474. Hence the vanishing.
Collarunglazed porcelain, turned and fired in Caldas da Rainha.
Turns the bottle from the front (0°) to the side (90°).
n 1.47
02 · THE FORMULA
Six ingredients. Nothing to see.
A short list, poured slowly. Every ingredient was chosen for what it does and for how little it moves the index. Anything that would cloud it, scent it or leave a film stayed out.
Sérum 1.47, concept formula
Ingredient
%
Why
Glycerin
6.0%
The humectant that set the index. Holds water in the top layers of skin.
Niacinamide
4.0%
Evens tone and supports the barrier. Dissolves perfectly clear.
Panthenol (pro-vitamin B5)
2.0%
Soothes and softens. Adds slip, not shine.
Hyaluronic acid, 3 weights
1.5%
High, medium and low molecular weights hydrate at different depths of the surface.
Ectoin
1.0%
A trick borrowed from desert microbes for holding on to water in dry air.
Squalane, micro-dispersed
1.0%
Dispersed fine enough to stay clear. Supple, never slick.
Base: water, propanediol. pH 5.4. No fragrance, no essential oils, no silicones. Concept formula for a fictional product.
pH 5.4
07:3012:0017:3020:00
03 · THE RITUAL
Three drops. Press. Wait a minute.
Mist 1.33 → Sérum 1.47 → SPF
3 drops
Into your palm, not onto your face. Count them out.
0 of 3 drops
Press, don't rub
Warm it between your hands, then press it into cheeks, forehead and neck. Hold to press.
Hold for 1.2 s
Wait 60 s
Let it settle before the next step. It's the only waiting it asks of you.
60 s
Then SPF
Every morning, every season. Sérum 1.47 is not a sunscreen.
04 · RESULTS
What disappearing looks like, measured.
+31%skin hydration at 8 hours*
0visible film on skin after 60 seconds*
93%said skin felt 'bare but comfortable'*
Gloss units at 60°, cheek, before → 60 s after. Sérum 1.47: 4.1 → 4.3. A typical gel serum: 4.1 → 9.8.*
*Fictional brand. Illustrative concept figures from an imagined 4-week study with 42 volunteers. Not a clinical or medical claim.
4.84.8 out of 5 · sample
5★82%
4★13%
3★3%
2★1%
1★1%
Sample review: reviews open at launch
“I put it on and then checked the mirror twice to see if I had. Skin just feels like skin.”
Marta, Porto · combination
Sample review: reviews open at launch
“Finally something that sits under SPF without pilling or shine.”
Jonas, Berlin · oily
Sample review: reviews open at launch
“Three drops really is enough. The bottle is the nicest thing on my shelf.”
Aiko, London · dry
05 · THE RANGE
Named for the way they bend light.
Mist 1.33 €36
100 ml
A water-light hydrating mist. Step one, morning and night.
Sérum 1.47 €78
30 ml
The index-matched hydrating serum. Three drops.
Oil 1.52 €64
30 ml
Squalane facial oil at the index of crown glass. For dry days.
Balm 1.44 €72
50 ml
A night barrier balm that melts clear.
The Index Set €168
Mist + Sérum + Balmsave €18
The full ritual in one box of recycled card.
Ships in recyclable glass. Refills from month 3 (concept). Free shipping over €60.
Journal
6 min read · coming soon
Why index matching matters
The physics behind a pipette that disappears, and why the same idea keeps a serum invisible on skin.
8 min read · coming soon
On the glass furnace
A morning at a small furnace in Marinha Grande, where our bottles are blown and ground.
4 min read · coming soon
A morning in Alfama
Hard light, limewashed walls and the colour we built the brand around.
VITRÈNE, laser-engraved inside 12 mm of solid glass. Read it through the lens.
Vitrène, Lisbon, since 2022.
Vitrène is an optical-skincare atelier on Rua da Boavista. We make four products and one set, in glass you'll want to keep. The name comes from vitre, a pane of glass: something you look through, not at.
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