Application of PVP in eye makeup (eye black, gel eyeliner): film bonding and anti-smudge auxiliaries
Eye black and gel eyeliner are the core categories of eye makeup. The pain points of the industry are mainly halo dye, slag, eyelash caking and eyeliner displacement. Polyvinylpyrrolidone PVP, depending on its excellent film-forming property and pigment adhesion, acts as a binder, film-forming agent and dispersion stabilizer in eye makeup, and is suitable for eye black, water-based gel eyeliner and other formulations.
1. Core mechanism of action
1. Bonding and film forming mechanism: PVP forms a flexible film after drying, firmly bonding carbon black and toner to the surface of eyelash fiber or eyelid skin, improving adhesion, reducing eye black scurf and eyeliner smudge displacement.
2. Mechanismus pro rozptyl pigmentu: Rozptýlit pigmenty pro oči, např. uhlíkový černý pigment, aby se zabránilo jejich shlukování a tvorbě hrudek, čímž se zaručí jemná pasta a hladké nanesení.
Mechanismus pro pružné nastavení: Film je měkký a nekřehký, čímž se zabrání ztuhnutí a splétání řas po nanášení štětcem a udrží se přirozený tvar stočených řas.
2. Applicationes typicae et controlus processus
1. Vodotěsné oční černé: Přidat 1,5–3,0 % PVP K60 ke zlepšení lepivosti filmu, vodotěsnosti a odolnosti proti potu, stočení řas a snížení nečistot. Klíčové body procesu: PVP, olej a vosk se zahřívají na teplotě 70–78 °C, aby se úplně roztavily a rozmíchaly, a barevný prášek se důkladně rozemle, aby byla pasta bez částic.
2. Gelus oculorum aquosus: adde 0,5–1,5 % PVP K30 ut viscositatem gellis regules. Tonum stabiliter dispergit, lineae sunt leves, et post siccationem pellicula formatur, quae plicaturas et maculas in palpebris minuit. Puncta processus principalia: PVP in mistura aquae et aethanoli solve, misce donec prorsus transparens fiat, deinde pasta colorata ad homogenizationem et dispersionem addatur, ut bullae evitantur.
3. Nigra oculorum tenuis: adde 1,0–2,0 % PVP K40 ut adiuvet coniunctionem fibrarum, effectum tenuitatis meliorat, pelliculam mollem faciat, et cohaesionem ciliarum prohibeat.
3. Advantages and safety features
Pellicula PVP est flexibilis et non format stratum fragile, durum aut facile fissum; contactus cum oculo est securus, non irritans, et normas securitatis pro cosmeticis oculorum implet; producta formulae aquosae facile per aquam tepidam aboleri possunt, sine residuo. Comparata ad tradicionales agentes formantes pelliculam polymericam, PVP fortitudinem adhaesionis et mollitiem cutis aequilibrat.

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