The article is good as an introduction, but you may want to know that all of our work is done with only a single red or green laser, though it can be theoretically done with two or three. Red lasers tend to produce larger images with less power at lower resolutions, while green lasers tend to be used for high-res images (like that Statue of Liberty on the page), though the image’s size when its burned does depend on how busy the cleaner and burner are and the size of the crystal itsself.