Looks like discussion has turned to printing which is of great interest to me. As a result of discussion to date I went and looked up the specifications for my
Canon Pixma Pro 100 printer (specs a couple of clicks away) and found the following which might be relevant:
Number of Nozzles
6,144
Print Resolution (Up to)
Color: Up to 4800 x 2400 dpi #4 Black Up to 4800 x 2400 dpi #4
Footnote #4. Resolution may vary based on printer driver setting. Color ink droplets can be placed with a horizontal pitch of 1/4800 inch at minimum.
Ink Droplet Size
Picoliter Size 3pl
Ink Capacity
8
From what I found a [picoliter] is one trillionth of a liter (pretty small amount) and the 8 must refer to the number of ink cartridges of different colors.
I don’t see anything about 300dpi although it is a value commonly used in postings on various websites. Is it possible that the meaning of dpi varies. For example, in above measure of print resolution might it mean droplets per inch. It appears that some uses of dpi mean dots per inch. Is it possible that dots are different than droplets? Might a dot refer to the printer's rendering of an actual color (somewhat like a pixel)?, which certainly requires multiple droplets. My own thought is that based on the range of colors represented by pixels the number of droplets involved in representing the color associated with a pixel must differ a fair amount.