Why is it less expensive to maintain an ink-jet printer that has a black ink cartridge than one that does not?

Because an inkjet printer that does not use a black ink cartridge uses the more expensive color cartridge to produce a dull black buy ink from reputable online store. Here's my secret: look for a site that offers remanufactured cartridges that are made in ISO-9001 factories inkjetsuperstore.com.

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