Yes it is. I have done several of them recently and they all turned out nicely. As with soaking any card you must keep and eye on them and make sure you don't soak to long or you run the risk of taking some of the back away as well. To also echo what Frank said you must change water frequently. I soak one card at a time and change water for every card regardless of whats on it. Why?? You don't want any dirt or maybe even glue or oil residues transferring from one to another. Maybe excessive but can't be to careful.