Is it ok to put a label on a dvd-r ?

[EVOEvo]

i notice with my audio disk i made i put labels on them aftr many times of useing the label starts to get bubbles in it and then then fold kresses makeing it hard to play in my cd player so it may work at first but u never know later on down the line they might start comeing off or bubbles in them

and the print on dvds how much ink u say it would use and dose it take long for the ink to dry on the disk ? i can get ink refils here for 1$ each color costing $3 total so i wouldnt have to worry about ink cost that much