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Dive into the World of Fragrances with Our Personal Stem Blog for Students


Why Does Perfume Smell Like Blood, Ice, and Even Credit Cards?
Introduction Fragrance collectors or any people who are interested in fragrances must have seen this website called Fragrantica. Well I was one of them. I looked through ultra-niche brands like Toskovat and look at their fragrances, well something had gone terribly wrong. I expected to see familiar niche notes like oud, sandalwood, incense, leather, or maybe some florals. Instead.. "Why does perfume smell like blood, ice, and even credit cards?". They even have the most weir
Kevin Liu Perdana
Jul 65 min read


Why You Can't Smell Your Own Perfume Anymore
Introduction I kept blaming my fragrances because I can't smell them. At the morning before leaving the house, I'd do 15 spray one of my sweet and spicy fragrance, Stronger With You Intensely by Armani, and enjoy the strong gourmand opening for about 15 Minutes. Then, almost like someone had flipped a switch, it was gone. Or at least, that's what I thought. I'd catch myself thinking, "Seriously? I paid $80 of cologne and it doesn't last? What happened!?" Then, I did a dumb
Kevin Liu Perdana
Jul 54 min read


Why You Shouldn't Rub Perfume After Spraying (The Science Explained)
Introduction When I wear fragrances the first time, I had one habit that I never questioned that it is actually a mistake in the fragrance community. Every time I sprayed perfume on my wrists, I immediately rubbed them together. It felt natural. I had seen people do it in fragrance ads ads, movies, fragrance counters, and even my friends rub them together, so I simply assumed it was the correct way to apply perfume. For years, I never thought twice about it. Then one day, wh
Kevin Liu Perdana
Jul 54 min read


Can Agricultural Waste Become the Future of Perfumery?
Every year, millions of tons of agricultural waste are discarded. Could some of it become the next generation of sustainable fragrance ingredients and perfume technology?
Kevin Liu Perdana
Jun 304 min read


What The Hell is Bergamot?
Bergamot appears in countless perfumes, but what exactly is it? Discover why this unique citrus fruit has become one of the most important ingredients in modern perfumery.
Kevin Liu Perdana
Jun 303 min read


Fragrance Science 101
Curious about how perfumes work? Discover the science behind fragrance ingredients, perfume notes, and the chemistry that creates every scent.
Kevin Liu Perdana
Jun 294 min read


How Does Perfume Reacts Differently to Different Skin Types?
When I first started collecting fragrances, I noticed something that genuinely confused me. One day, my friend wore one of my favorite fragrances, Valentino Uomo Born in Roma Yellow Dream EDT. Even though we were wearing the exact same perfume, it didn't smell exactly the same. On my skin, I could smell the bright mandarin and fruity pineapple notes more clearly. On my friend, however, the fragrance felt sweeter, woodier, and slightly spicier. Sometimes, the opposite happened
Kevin Liu Perdana
Jun 284 min read


Can Palm-base Oleochemicals Support The Future of Fragrances?
Kevin Liu Perdana × Laden Mering Introduction Fragrance is often associated with beauty, luxury, memories, and personal identity. Fragrances can help other people too: a single scent can remind someone of a place, a person, or an unforgettable moment. As students who are interested in chemistry and fragrance science, we have always been curious about what happens behind the scenes of a perfume bottle. Most people focus on the scent itself, but we became interested in the ing
Kevin Liu Perdana
Jun 274 min read


Exploring the Potential of Agarwood Cultivation on HTR Land in Tualan Hulu
When I first smelled oud, I never imagined it would lead me to learn about sustainable forestry. This article explores how agarwood cultivation on HTR land in Tualan Hulu could support local communities, protect forests, and show that one of the world’s most valuable fragrance ingredients has a story far beyond perfume.
Kevin Liu Perdana
Jun 274 min read


Reviving Sustainable Patchouli Production Around PT Hutan Sawit Lestari
What started as my curiosity about fragrance chemistry led me to discover the story of patchouli farming in communities around PT Hutan Sawit Lestari. This essay explores how science, renewable energy, and sustainable practices could help improve patchouli production while supporting local livelihoods and protecting the environment.
Kevin Liu Perdana
Jun 273 min read


How Chemical Engineers Help Create Fragrances
When most people think about fragrances, they usually think about perfumers, which are the people who create the scent itself. For a long time, I thought the same thing. I grew older and I thought to myself that not a single chance they made thousands of bottles with the same formula all by themselves. As I became more interested in fragrances, however, I started asking myself the same questions..How are these products actually made? How does a fragrance go from an idea, to a
Kevin Liu Perdana
Jun 242 min read


The Story of How I Became OBSESSED with Fragrances
Well, my interest in fragrances did not begin with expensive niche or private-line fragrances or maybe a fragrance collection. Like many people, it started with simple fragrances I wore when I was younger. At kindergarten, I wore Master Kids perfume, and they smell very "barbershopy" and also fragrances what my dad wore such as Yves Saint Laurent Y Eau de Parfum: versatile freshie and smell like a synthetic apple bodywash, BUT I enjoyed how they smelled, but I never really t
Kevin Liu Perdana
Jun 242 min read
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