[sinisterlee]

Any good sources for black disappearing ink?

Some people mentioned ali express but only found disappearing ink pens or bottles of ink that are meant for pens.
I assume that filling a reusable printer cartridge with that kind of ink is not a good idea and has a low chance of working.
Let alone the chance of destroying your printer.

Is there some kind of spray, chemical that could be applied to a freshly printer inkjet label that would erase the label info in 4-6 hours?
As mothered said carriers require that the colour of the printed label is black so not alternative colours will do the job.