When using reprographic services, you do not have to pay with money, just use the credits on the card. Credits are valid for one year from the date of purchase of the card.
Credits on the card can be used for:
printing a black and white page: 1 credit,
printing a color page: 4 credits,
3D printing, 1 gram of material: 1 credit,
badge making: 10 credits/piece
material for engraving 10×15 cm: 20 credits