Can somebody answer fast?
I need to burn 100 dvds for tomorrow. The project is being processed and I would like to start at least printing the faces versus waiting for them to be burned first.

Maybe it's stupid question, but can I do this?

yes, we often print before burning the disc. be carfeul of not getting any fingerprints on the backside of the disc. Do not stack the printed discs on top of each other until the ink has dried.

thank you so much

now I better get to work :)

Epson warns against that due to scratches, but in practice, I have not seen the Epson R800 ruin discs that way. If you think about it, a burn is more reliable if the data verification part of the burn is run on the final disc.

Provided you give the discs time to dry as George mentioned, your concern is smudging the ink and generating "spider ink" effects when wet ink is spun at high speeds in your burner. This is more of an issue with the dye inks which seem to need 24 hours to dry, but you can aid that with good air circulation, possibly even a quick pass over with a warm (not hot) hair dryer set to a mild stream. A better choice would be a fan.