Trying to print a very small design (smallest side is 0.035 millimeters). The accuracy is very important, even though this is not readable by normally sighted person's naked eyes. Tried printing on 2400 dpi laser printer as well as LED photo printer on photo paper. But they don't turn out clear, if not just a blob.
The printing process for the finest printed detail is gravure on non-porous stock such as plastic generally speaking. It's the way currency is printed among other valuable types of documents.
I have also make calibration combs for radio telescopes photographically using process cameras (achromatic lenses) to place images on sound-recording film which is quite fine-grained and can render detail well. Sound recording film also has excellent opacity at dmax.
For ink-jet accuracy, you must find the finest dot-addressability (as in a fine line screen) not only the spot size (per scan) or the dot size of the ink jet orifice.
Image edges on paper or film aren't sharp and smear or "spread" due to photographic image "fog" or printed ink "dot gain". The smaller the image, the greater percentage of it is affected and degraded by unwanted image "artifacts."