Open Studios Sessions at Artist Proof Studio
Oddly enough, we’ve had a fair few designers ask whether we knew of a good place in Johannesburg to do professional printing. We didn’t, but we’ve asked around and chatted with a few of the right kinds of people and feel that we can now quite confidently recommend that you talk to Artist Proof Studio, who are based in Newtown.
From the Artist Proof Studio bio on Facebook:

You’ll need to buy your own plates and paper, which you can buy from Artist Proof Studio themselves (let them know by the Tuesday before you attend what you’ll need for your Friday session).
gallery@artistproofstudio.co.za