▁Sk in ▁ton ics ▁ ▁These ▁are ▁slightly ▁stronger ▁and ▁contain ▁a ▁small ▁quantity ▁of ▁alco hol ▁( up ▁to ▁ 2 0 % ), ▁water ▁and ▁a ▁hum ect ant ▁ing red ient . ▁ ▁Orange ▁flower ▁water ▁is ▁an ▁example ▁of ▁a ▁skin ▁t onic . ▁ ▁Sk in ▁ton ics ▁are ▁suitable ▁for ▁use ▁on ▁normal , ▁combination , ▁and ▁o ily ▁skin . ▁ ▁Ac id ▁Ton ers ▁ ▁These ▁are ▁a ▁strong ▁form ▁of ▁ton er ▁that ▁typically ▁contains ▁alpha ▁hydro xy ▁acid ▁and ▁or ▁beta ▁hydro xy ▁acid . ▁Ac id ▁ton ers ▁are ▁form ulated ▁with ▁the ▁intent ▁of ▁chem ically ▁ex fol i ating ▁the ▁skin ▁instead ▁of ▁phys ically ▁ex fol i ating ▁it ▁which ▁has ▁been ▁proven ▁to ▁create ▁micro - te ars ▁in ▁the ▁skin . ▁G ly col ic , ▁L actic , ▁and ▁Mand el ic ▁ac ids ▁are ▁the ▁most ▁commonly ▁used ▁alpha ▁hydro xy ▁ac ids , ▁best ▁su ited ▁to ▁ex fol iate ▁the ▁surface ▁of ▁the ▁skin . ▁Sal icy lic ▁acid ▁is ▁the ▁most ▁commonly ▁used ▁beta ▁hydro xy ▁acid ▁best ▁for ▁ex fol i ating ▁into ▁the ▁deeper ▁layers ▁of ▁the ▁skin . ▁ ▁A string ents ▁ ▁These ▁are ▁the ▁strong est ▁form ▁of ▁ton er ▁and ▁contain ▁a ▁high ▁proportion ▁of ▁alco hol ▁( 2 0 – 6 0 % ), ▁ant ise ptic ▁ing red ients , ▁water , ▁and ▁a ▁hum ect ant ▁ing red ient . ▁ ▁These ▁can