The developer is not a toner. It goes in the developer unit, it is installed by a service rep. You need to empty out the used developer & install the new bag of developer & rest the counter & set the developer up to add toner when needed. To make a long story on developer short > it is made up of iron filings & it holds the toner on the developer make roller to make a even coat of toner on your paper... Good Luck..... Just to let you know your copier is a Ricoh and it is a dul component copier
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