High-resolution scientific talking-head video,
fixed camera, locked framing, upper body visible,
no camera movement,
professional laboratory lighting optimized for short-video platforms,
global brightness intentionally elevated,
facial skin exposure locked as absolute priority,
no overexposure, no clipped whites,
highlights preserved on face and lab surfaces,
full laboratory environment visible and clear,
background brightness capped below facial exposure,
no blown highlights anywhere in frame,
female researcher @liuyan7,
wearing white lab coat and white shirt,
clean, professional, scientific appearance,
facial skin in ideal healthy condition,
skin smooth, elastic, hydrated, refined,
fine lines visually softened by lighting,
no emphasized wrinkles,
complexion corrected to remove yellow or gray cast,
fair skin with healthy pink undertone,
white-and-pink clarity, translucent and bright,
skin looks clean, even, and youthful,
natural skin only, no makeup, no lipstick, no blush,
skin quality achieved by lighting and exposure only,
no beauty filter, no artificial smoothing,
image sharp, high micro-contrast,
facial details clear even after platform compression,
no blur, no haze,
@liuyan7 说：”看到过一些分层案例，常会同时出现乳化稳定性不足、冷却阶段剪切变化过大，或者 A 醇进入体系时的预处理方式不一致。” 镜头切换至@liuyan7 在显微镜前取样观察乳化结构，画外音叙述多个实际案例：乳化不稳定、冷却时剪切力突变、A醇预处理方式不一致等问题，画面穿插慢动作回放工艺流程片段，强调关键控制点，冷白灯光下设备运转，营造严谨工程复盘氛围。不要有背景音乐
Negative prompt:
overexposure, blown highlights, clipped whites,
beauty filter, makeup, lipstick, blush,
plastic skin, pore blur, over-smoothing,
cinematic lighting,
yellow skin, dull skin, gray skin,
blur, haze