and how can I tell which ones are new? I'm new to laser printers so please bear with me. How can I tell they haven't been used or how can I tell that the cartridge is full?My friend gave me some Epson AcuLaser C1100 toner cartridges. How do I know which ones have been used.....?
how heavy they are. Or just put them in the printer and see what happens.
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