Throughout this guide, you will have seen mention of various print technologies, including inkjet, zink, and thermal. Each has its pros and cons.
Inkjet
Inkjet is the most popular printing technology and probably the one you're most familiar with. It works by putting tiny drops of ink onto the page at a rate indicated by the DPI.
Zink
Zink is short for "zero ink" and refers to a type of printing that requires no ink cartridges whatsoever. Instead, all color required is embedded in the paper, making it popular for instant mobile printers. This means it's potentially better for the environment, too.
Thermal
Thermal printing, like zink, uses specialized paper rather than ink cartridges to deliver its results. A thermal printer will heat the paper according to the desired image, causing the picture to show up.