Shaving comfort is linked to friction, and thus lubrication, in the razor cartridge/skin interface. It is a distinguishing factor when a user evaluates the perceived quality of a shave. A novel Laser Induced Fluorescence (LIF) technique was developed to study lubrication in a razor cartridge/skin mimic contact under simulated shaving conditions. The experiments were conducted with a 5-blade cartridge, loaded and sliding against a transparent silicone elastomer. The lubricant was distilled water marked with fluorescent dye. The LIF technique measured in-contact film thickness at different sliding speeds (50, 150 mm s⁻¹) and showed differences in lubricant distribution for each component (lubricant strip, blades, guard) interface. The measured calibration film thickness range was 2–135 μm. The guard and lubricant strip maintain relatively thick and consistent lubricant films across the speed range. Minimum films were measured at the blade cutting edges, although at sliding speeds of 150 mm s⁻¹ the blade cutting edge film thickness increases towards the back of the cartridge; and film thickness under blades 1 and 2 decreases at high speeds, suggesting starvation of fluid flow. The new technique allows study of lubrication behaviour in complex geometries, multiphase fluids and hard/soft material combinations for example oral processing, contact lens/eyelid and personal care product application. These systems are not easily studied by conventional test methods or classical lubrication analysis.

剃须舒适度与剃须刀刀片架/皮肤界面中的摩擦以及润滑有关。当用户评估剃须的感知质量时，这是一个区别因素。开发了一种新的激光诱导荧光 (LIF) 技术来研究在模拟剃须条件下剃刀刀片架/皮肤模拟接触中的润滑。实验是使用 5 刀片墨盒进行的，加载并在透明有机硅弹性体上滑动。润滑剂是用荧光染料标记的蒸馏水。LIF 技术测量了不同滑动速度（50、150 mm s ^-1）下的接触膜厚度，并显示了每个组件（润滑条、叶片、防护装置）界面的润滑剂分布差异。测量的校准膜厚度范围为 2–135 μ米。防护罩和润滑剂条在整个速度范围内保持相对较厚且一致的润滑剂膜。在刀片切割边缘测量了最小薄膜，尽管在 150 mm s ^-1的滑动速度下，刀片切割边缘薄膜厚度向着刀片架的背面增加；叶片 1 和 2 下的油膜厚度在高速下会减小，表明流体流动不足。新技术允许研究复杂几何形状、多相流体和硬/软材料组合中的润滑行为，例如口腔处理、隐形眼镜/眼睑和个人护理产品应用。这些系统不容易通过传统的测试方法或经典的润滑分析进行研究。