How four makeup factories create products from lipstick to eyeshadow

• ColourPop Cosmetics and Persona Cosmetics both create products for the eyes and lips in LA.
• Benefit Cosmetics' Precisely My Brow pencils go through serious testing before they're sold.
• Rimmel London's cosmetic scientists test matte lipstick formulas to make sure they're long-lasting.

Following is a transcript of the video.

Narrator: Here's how four makeup factories create their products.

ColourPop Cosmetics makes its products in Los Angeles. To make its fan-favorite Lippie Stix, in-house chemists mix the base formula with powder pigments. That goes through a mixer three times to make sure everything is evenly combined. Then the mixture is poured into a mold, the extra lipstick is scraped off, and the entire container is chilled. It's unmolded and transferred into tubes. The brand's crème gel liner pencils are made with a similar process. First, the pigments are weighed and mixed. A liquid blend of ingredients is added to the powder to make the liners smudge- and transfer-resistant. It's mixed a few times so that it's all well blended. Filler is added to make sure the eyeliner can spread easily when applied. And wax is added to help keep the eyeliner in place. The mixture is placed in the eyeliner mold, carefully pushed through, then wrapped in a plastic wrap to prevent contamination. The final eyeliner is then packaged by hand and shipped.

Benefit Cosmetics' Precisely My Brow pencil is one of the brand's best-selling products. It all starts inside its Tokyo factory. White, black, yellow, and red pigments are combined with ingredients like stearic acid that help thicken the mixture. A variety of waxes and oils are added, which help bind all the ingredients together. The mixture is poured into a rolling machine, which turns it into a pencil-shaving consistency. Those shavings are compressed together to create the core of the pencil. A machine cuts it into tiny, precise pieces, then it goes through a shade and durability test. The shade test makes sure every color is what it's supposed to be, while the durability test makes sure the product can endure 25 times its weight before breaking. The products that pass the test are individually filled by hand and x-rayed before making their way to stores and your brows.

Rimmel London's Stay Matte Liquid Lip Colour products are made to be super pigmented and long-lasting. Cosmetic scientists test the matte formula to make sure it's touch-proof, kiss-proof, and waterproof. Each color is tested for smoothness. Then it's mixed with the base matte formula. The mixture goes inside a viscometer to test the thickness. And, finally, it's bottled and tested to make sure it passes the matte test. There are currently over 20 matte shades you can try.

Sona Gasparian is an LA-based beauty blogger and the founder of Persona Cosmetics. Persona carries a variety of lip, eye, and face products. When creating her eye shadows, Sona develops a formula and colors alongside a chemist. She also determines the press levels for each shade to make sure the eye shadows have less fallout and more pigment. Once all the shadows are ready, they're packaged and shipped. These are the brand's Color Theory Eye Kits. Sona's audience goes along for the ride with every product development, contributing to the scent, formula, and shades of products.