The unique composition of the Unison toner delivers consistently high image quality, ensures longevity and reliability of the printing system and ensures unique sustainability - all in a "shake-free" printing system - and is therefore indispensable for the performance of the Lexmark printing system. Unison toner The unique composition of the Unison toner delivers consistently high image quality, ensures longevity and reliability of the printing system and ensures unique sustainability - all in a "shake-free" printing system - and is therefore indispensable for the performance of the Lexmark printing system. Optimal interaction Original Lexmark consumables are designed to work optimally with your Lexmark printer and deliver excellent print quality from the first to the last page.