Figure 9
From: Corona discharge plasma for green de-inking of inkjet printer ink
Images of water contact angle measurements on untreated samples for (a) yellow printed paper on the back side, (b) blue printed paper on the back side, and (c) red printed paper on the back side and plasma-treated samples for (d) yellow printed paper at 10 min on the back side, (e) blue printed paper at 2 min on the back side, and (f) red printed paper at 10 min on the back side.
