alt Hacker NewsPrinters that can keep all the color channels lined up all the way down to their tightest dot pitch are few and far between. That is why piql used black and white for the boxing code they used to print out all of github. I'm not sure why greyscale wasn't used.
> Printers that can keep all the color channels lined up all the way down to their tightest dot pitch are few and far between.
It only takes one for a PoC. It only takes few to establish a service. Spatial and color accuracy is going to be a challenge, but I imagine there already exist methods to correct for that - e.g. printing reference patterns along with the data, so the scanner/digitizer can calibrate to it on the fly.