The laser printer ink is composed of plastic flakes, not ink as you are thinking.
Try printing a page on a laser printer, apply a little water. The "ink " does not run
Try that same experiment with ink jet printing. The ink runs
When you go to etch the board the inkjet ink will not stick.
IMO the best way is using Pulsar paper.
Sure its expensive BUT it works.
One method if wanting to use inkjet is print on a transparancy then using a photo sensitive board do your magic. Cost more than using the Pulsar method.
I understand Staples photo paper works ok.