Fax Machines Most agree that the biggest advantage of thermal fax machines is the cost. As a tried and true machine with basic components, thermal fax machines are cheaper to build, and thus cheaper to buy. The cost benefits can prove better in the long run as well, especially compared to inkjet fax machines, which require expensive ink cartridge refills. For those machines that use the direct thermal method, the only refill they need is the paper itself.
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