I have had an HP1606dn copier for a few years. At first I bought generic branded cartridges but then switched to HP 78A toner cartridges. Compared to original HP 78A cartridges, normal branded cartridges seemed to run out much faster. I suspect generic cartridge manufacturers refill them with less toner powder. Generic manufacturers are worth their money in my opinion. The lower price leads to less good specimens.
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