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. 2015 Oct 1;3:e1296. doi: 10.7717/peerj.1296

Figure 4. Split graphs comparing the effects of shampoo and conditioner on permanently waved hair.

Figure 4

In (A), the untreated sample is compared with the permed hair. In (B), the permed hair is compared with the permed and shampooed sample. In (C), the permed hair is compared with the permed hair treated with conditioner and in (D) the permed sample is compared with the permed sample with both shampoo and conditioners applied. Similar to Fig. 3, the red outer ring is the result of the instrumental background.