Thermal Thermal is the technology used by Hewlett-Packard, and other printer brands, where heat is used to force the ink through the nozzle of the printhead onto the paper. Think of the geyser Old Faithful, only smaller. The quality of this output is called the resolution. Resolution is measured as dots per inch or dpi . The higher the dpi, the better the resolution.
Colors are richer and tones are deeper due to the ability to add more dots per inch.
Picoliter Droplet size is another factor in determining the overall output quality. The inkjet industry measures inkjet drops by the industry standard - picoliters . A picoliter is one-millionth the size of a raindrop. As you can see by the size of the picoliter, this is somewhat subjective industry jargon that may not effect most inkjet users. It s truly a question of how much we can really see with the naked eye one picoliter is microscopic.