As shown in Fig. 7A, the area of the spectrum from 290 nm to
400 nm is 75.299 nm Abs, the 90% of this area is 67.769 nm Abs.
According to Fig. 7B and C, the area of the spectrum from 290 nm
to 390 nm and to 389 nm is 68.434 nm Abs and 67.706 nm Abs,
respectively. In conclusion, the kc of CDBA-liposomes when mixed
with the cream substrate is between 389 nm and 390 nm which is
greater than 370 nm, so the level of this formulation is 4 star which
belongs to the category of UVA protective function according to the
broad spectrum classification.