Table 11.

Scoring standard of hydrogel sensory index.

Index of Evaluation	Request	Scale of Marks	Score
External properties	At room temperature, the hydrogel is clear and transparent, and it does not dry out or liquefy	Clear and transparent, not dry or liquefied	7~10
		More clear or transparent, but not liquefied or dry	4~6
		Unclear, or appears dry or liquefied, fluid dynamics	0~3
Homogeneity	The surface is smooth, uniform, and delicate; no/a small amount of bubbles exist; no precipitation	The surface is smooth, uniform, and delicate; no/a small amount of bubbles exist; no precipitation	7~10
		The surface is smooth, delicate, and uniform; a small number of small bubbles exists; no precipitation	4~6
		The surface is not smooth, delicate, or uniform, and there are larger or more bubbles or precipitation	0~3
Spreadability	It is sticky, easy to apply, and comfortable on the skin surface after application	Good viscosity, easy to apply, comfortable skin surface after application	7~10
		Poor viscosity, slightly difficult to apply; after applying, the skin surface is comfortable	4~6
		Poor viscosity, difficult to apply; the skin surface is not comfortable after application	0~3
Centrifugal stability	It should be uniform without variation and without stratification	Uniform without variation and without stratification	8
		Stratified	3
		Distinct stratification	0