The slaye journal

Technique, history, product science, and trend analysis — written by people who actually wear makeup.

trends

Espresso vs latte makeup: the warm-brown trend, side by side

Latte makeup is the milky daytime cousin. Espresso is the cocoa-dark evening one. Side-by-side product references, undertone math, and when to skip both.

May 15, 2026 · Sienna Park

product-science

Bakuchiol vs retinol: what the clinical trials actually show

Dhaliwal's 2019 trial put 0.5% bakuchiol head-to-head with 0.5% retinol over 12 weeks. The result, the methodology, and where the marketing copy breaks.

May 15, 2026

technique

Inner-corner brightening: white pencil placement that opens the eye

A V of cream pigment at the tear duct re-spaces the eye more than mascara can. Placement rules, tone choices by undertone, and when the waterline backfires.

May 15, 2026

routines

Long-haul flight makeup that survives cabin dehydration

Cabin humidity drops below 20% within an hour. The pre-flight prep, the thin layer to actually fly in, and the fifteen-minute reset after landing.

May 15, 2026

history

Versailles rouge: the painted circle on 18th-century cheeks

How Versailles turned a dot of carmine and alum into a class signal. Louis XV's decree, the painted circle, and the lead-cinnabar history nobody mentions.

May 15, 2026

inspiration

Isamaya Ffrench: from kids' party face paint to Burberry beauty

She painted tigers at children's birthday parties at 22. Twelve years later she runs Burberry Beauty and her own brand. The route Isamaya Ffrench took, and why it worked.

May 14, 2026

history

Maybelline: the vaseline and coal-dust origin of modern mascara

Mass-market mascara started with a kitchen-stove fire in 1915 Chicago. The story of Mabel Williams, her brother Tom Lyle, and a recipe that built a billion-dollar brand.

May 14, 2026

product-science

Retinyl palmitate: does pro-retinol eye cream actually work?

Pro-retinol eye creams are everywhere. The conversion math from retinyl palmitate to retinoic acid says they barely qualify as retinoids at all.

May 14, 2026

trends

Vamp romantic: how plum and burgundy lips went year-round

Pinterest's vamp-romantic forecast killed the rule that burgundy lipstick belongs to October. Why the glossier finish made dark plum a year-round shade.

May 14, 2026

technique

Velvet matte: the modern matte finish that doesn't flatten skin

Old matte powder killed dimension. The new velvet matte uses ultra-fine silica and light-scattering pigments to keep skin soft-focused without going flat.

May 14, 2026

trends

Cherry blossom makeup: the airy spring pivot

Cherry blossom is spring 2026's softer answer to strawberry girl. Pink stays, the saturation drops, and the application gets diffuse. Here's how it actually works.

May 13, 2026

product-science

Polyhydroxy acids: the gentle cousin of glycolic

PHAs (gluconolactone, lactobionic acid) exfoliate without the AHA sting. Larger molecules slow the burn. Here's the chemistry and which serums actually deliver.

May 13, 2026

routines

Post-workout makeup: the five-minute gym reset

The smarter gym-makeup question isn't what survives spin class. It's the five-minute reset after: cleanse, tinted SPF, cream blush, mascara. Here's the order.

May 13, 2026

history

Rubinstein vs Arden: the feud that built modern cosmetics

Helena Rubinstein and Elizabeth Arden ran rival cosmetics empires for fifty years and never met. The industry they built still runs on their playbook.

May 13, 2026

technique

Tightlining: the inner-rim trick that thickens lashes

Tightlining packs pencil into the upper waterline so the dark base reads as lash density, not eyeliner. Here's why it changes the eye more than a wing.

May 13, 2026

inspiration

Bobbi Brown's day at Bergdorf: 100 tubes in eight hours

In February 1991, Bobbi Brown brought 500 lipsticks to Bergdorf and forecast 100 sales a month. She sold a hundred tubes in a single day. The story behind it.

May 9, 2026

product-science

Cica: what madecassoside actually does to your skin

Cica's marketing is vague. The chemistry isn't. Four triterpenoids do the work, and one of them is doing more than the others. A breakdown of what each does.

May 9, 2026

technique

Where to put a floating crease, by eye shape

The floating crease lives or dies by where you place it. A field guide to the right placement on almond, hooded, monolid, and downturned eyes.

May 9, 2026

trends

Glitchy glam is the trend killing clean girl

Pinterest's 2026 Predicts report has avant-garde makeup searches up 270 percent and clean girl interest fading. Glitchy glam is the deconstructed look replacing it.

May 9, 2026

routines

A monochrome pink face from five products in five minutes

Monochromatic only works when every product sits in the same undertone. Five products, five minutes, one rule: pick the undertone first and never cross it.

May 9, 2026

inspiration

Charlotte Tilbury: the makeup artist who launched her brand at forty

Twenty years on Mario Testino's covers before a single shelf. The Charlotte Tilbury origin story, and what apprenticeship in editorial actually buys.

May 8, 2026

routines

Melt-proof workday makeup: a 10-minute routine for humid mornings

A real ten-minute routine for humid commutes. Gel moisturizer, silicone primer, cream-on-cream layering, and the lip finish that survives a Tuesday.

May 8, 2026

trends

The blurred berry lip: the trend replacing glossy lipgloss

Blurred berry lip explained: where the trend came from, the K-beauty roots, the formulas that work, and how to apply it without looking blotchy.

May 8, 2026

history

Twiggy's painted bottom lashes: the 1966 mod eye, deconstructed

Twiggy wore three pairs of false lashes on top and painted every lower lash on with a brush. The 1966 mod eye, taken apart line by line.

May 8, 2026

product-science

Why your sunscreen pills under foundation: the silicone problem

Sunscreen pilling is a polymer-film failure. Here's the silicone chemistry behind it, and the three changes that actually fix it for good.

May 8, 2026

technique

Blush draping by face shape: the C-curve rule that actually works

Blush draping is contour with pigment instead of shadow. The C-curve lifts every face shape, but the angle and pitch shift for round, oval, or long faces.

May 7, 2026

trends

Jelly blush vs cream blush: which actually melts into skin

Jelly blush searches climbed 1,300% year over year. The jiggly texture behaves nothing like a cream stick, so here is how each formula sits on real skin.

May 7, 2026

history

Kohl and galena: the chemistry of 5,000 years of eye paint

Egyptian kohl was a lead-sulfide cosmetic with real antimicrobial chemistry, not just decoration. Tracing the recipe from Badarian graves to today's tubes.

May 7, 2026

product-science

Niacinamide and vitamin C: the incompatibility myth, debunked

The rule against layering niacinamide with vitamin C traces to old tube-test chemistry. Here is what actually deactivates ascorbic acid, and what does not.

May 7, 2026

history

Oshiroi: how geisha white makeup went from rice to titanium

Oshiroi has been worn in Japan for fourteen centuries. Tracing its formula, lead, then zinc, then titanium dioxide, ends at the molecule in your sunscreen.

May 7, 2026

inspiration

Pat McGrath: from i-D magazine to a billion-dollar makeup empire

Pat McGrath has no formal training and prefers her hands to brushes. The path from a 1990s i-D shoot to a billion-dollar brand at fifty rewrites the rules.

May 7, 2026

technique

Siren eye vs doe eye: the geometry behind each shape

Siren eye and doe eye start with the same kohl pencil and treat the same face as opposite geometric problems. Here is how to know which flatters yours.

May 7, 2026

routines

Slugging on combination skin without the clog

Slugging works for dry skin, but the standard 'last-step Vaseline' wrecks combination t-zones. Here is how to keep the barrier benefit without the breakout.

May 7, 2026

trends

Under-eye blush: the aegyo-sal trend, explained properly

TikTok's under-eye blush look rebrands a Korean beauty fixture from 2014. Here is what aegyo-sal actually means, and how to wear it without looking puffy.

May 7, 2026

product-science

What peptides actually do in your moisturizer (and don't)

Peptides are sold as 'Botox in a bottle', but the evidence base is thinner than for retinoids. Here is what each class actually does on real skin.

May 7, 2026

trends

Cloud Skin: The Blurred Semi-Matte Finish Replacing Glass Skin

Cloud skin is the K-beauty pivot away from glass skin: a soft, semi-matte finish that reads as well-rested skin instead of a digital filter.

May 6, 2026

routines

A Five-Minute Makeup Routine for Working Mornings

A realistic five-minute weekday face for someone leaving the house at eight. Three multitaskers, a thirty-second eye, named picks at three price tiers.

May 6, 2026

history

Red Lipstick: A Five-Thousand-Year History

Red lipstick has been crushed gemstone, mercury sulfide, fish-scale shimmer, and lead. The 5,000-year story is mostly about pigment chemistry, and luck.

May 6, 2026

technique

The Case for Contouring Before Foundation

Underpainting flips the order: contour and highlight first, sheer foundation on top. The result is a sculpt that reads as bone, not product.

May 6, 2026

product-science

Why Your Foundation Turns Orange by Lunch

What everyone calls foundation oxidation is mostly iron oxide pigment agglomerating with sebum and skin pH. Real chemistry, real fixes.

May 6, 2026

inspiration

Welcome to the slaye journal

A new home for writing about beauty and makeup — technique, history, product science, and trend analysis. Here's what to expect from the slaye journal.

May 5, 2026