Table 2.

Classification system for skin reactions.

Erythema reaction	Score	Edema formation	Score
No erythema	0	No edema	0
Very slight erythema	1	Very slight edema	1
Well defined erythema	2	Well defined edema (edges of the area are well defined)	2
Moderate to severe erythema	3	Moderate edema (raising approximately 1 mm)	3
Severe erythema (beet redness) to scar formation	4	Severe edema (raising more than 1 mm and extended beyond the area of exposure)	4
The total possible score for primary irritation	8