Yer. I bought the Caswell copy cad kit. Quite expensive and you need  to supply a power supply and ph testing equipment that don't come with it. Takes a lot of time to perfect as you play with different methods. Expect poor results to start with until you work out a method that works for you. I never perfected it by got reasonable results on small pieces. It's a hobby on its own in opinion. If you've got the patience and time and don't mind a few failures along the way it is worth it.