Table 2. UVA and UVB blocking rates of 10–60% different concentrations acid-treated SR^a.

	SR-CNF10	SR-CNF20	SR-CNF30	SR-CNF40	SR-CNF50	SR-CNF60
B UV-A%	93.2	90.7	75.3	72.6	59	54.5
B UV-B%	96.2	95.5	87.9	85.7	74.2	71.6

^aWhere, B_UV-A% represents the blocking rate in the long-wave UV region, while B_UV-B% represents the blocking rate in the medium-wave UV region.