Polyvinylpyrrolidone K90 (PVP K90) is a high-molecular-weight water-soluble polymer with a molecular weight of approximately 1.3 million, corresponding to a K value of approximately 90, hence the name "K90". As a commonly used excipient in cosmetics, its outstanding characteristics include excellent film-forming properties, moderate viscosity, and good water solubility and compatibility. It can easily dissolve in water or ethanol systems to form a clear and transparent solution. Furthermore, its mild, low-irritant, and highly stable characteristics allow for wide application in various beauty products, becoming an important contributor to optimizing the user experience.

In hair care, PVP K90 is a practical "styling and moisturizing helper". When styling hair daily, it's common to encounter situations where a hairstyle done in the morning easily becomes limp and deformed by the afternoon, or hair becomes stiff and clump-like after using hairspray. When PVP K90 is added to hairspray, hair wax, and other products, it forms a transparent and elastic film upon contact with hair, evaporating with moisture to effectively hold the hairstyle in place. It doesn't easily deform even in humid environments, leaving a naturally smooth feel without any stickiness or white residue. Adding this ingredient to shampoo results in denser lather that lasts longer, reduces static electricity after washing, makes wet hair easier to comb, and gives dry hair a more natural shine. It also helps reduce the harmful effects of UV rays on hair.

In skincare and makeup, the multi-functional properties of PVP K90 are fully utilized. Adding this ingredient to skincare products results in a smoother, more delicate texture, without any stickiness or discomfort during application. It also forms a moisture-locking film on the skin's surface, reducing moisture loss and extending the moisturizing effect. Peel-off masks are easily removed without causing significant skin irritation thanks to its excellent film-forming properties. When added to foundations and BB creams, this ingredient improves skin adhesion, reducing the likelihood of caking or creasing, extending makeup wear time, and minimizing makeup smudging due to sweat. In lipsticks and lip glosses, it ensures more even color application and stable color payoff, while also alleviating dryness and chapping. It also plays a crucial role in the setting and smudge-proof effects of brow gels and mascaras, without causing clumping or stiffness in lashes.

Regarding the safety of chemical ingredients, PVP K90 is not a major concern. This ingredient is non-toxic and non-irritating, exhibiting good safety even when used in products for sensitive skin or delicate areas like the eye area, unlikely to cause allergic reactions or discomfort. It blends well with other common cosmetic ingredients without adverse effects and is biodegradable, making it environmentally friendly. Compared to similar low-molecular-weight products, PVP K90 has superior film-forming properties and viscosity, making it particularly effective in products requiring stable setting and good adhesion. 

From daily hair care to various makeup products, PVP K90 subtly optimizes the user experience of beauty products with its multi-functional features, yet it receives relatively little attention. Like a "behind-the-scenes helper" in cosmetics, it uses its own properties to solve various minor problems in skincare and makeup, being both safe and gentle, practical and reliable, becoming an indispensable ingredient in beauty formulas.

PENGFEI is a company dedicated to the research, production, and sales of 2-pyrrolidone (2-P), N-vinylpyrrolidone (NVP), and polyvinylpyrrolidone (PVP)