It is forbidden to disinfect dental chairs by means of alcohol, fortified glutaraldehyde disinfectant, 84 disinfectant, benzalkonium bromide disinfectant and benzyl chloride containing ammonium propanol disinfectl chairus acid and alkaline disinfectants. The manufacturer shall assume no liability or responsibility for any damage of leather of dental chairs (such as color difference chap and aging) caused by it.