Ametek Brookfield has published an application note detailing the use of its CT3 Texture Analyser in analysing the hardness of eye pencil tips.
The hardness of an eye pencil tip is important; the texture of the eyeliner should be such that upon application, it smoothly glides along effortlessly enabling ultimate control and flexibility. The consistency of the eyeliner together with its soft texture will influence its performance. For example, a tip that is quite dry may cause discomfort to the user during application by pulling or tugging at delicate eye tissue.
The CT3 texture analyser utilises an eye pencil rig to quantitatively measure the hardness of eye pencil and lip lining tips.
