The following is how to connect a Bluetooth printer. The key is using a Manual URI with the MAC address without semicolons as the hostname.
Easy when you know how.
This give a good summary of the bluez-tools:
root@Spectre ~ # rfkill list
lists the various adapters, including
root@Spectre ~ # hcitool scan
lists the various devices available, including H470. Note its MAC address:
The AppSocket protocol (sometimes also called the JetDirect protocol, owing to its origins with the HP JetDirect network interfaces) is the simplest, fastest, and generally the most reliable network protocol used for printers. AppSocket printing normally happens over port 9100 and uses the socket URI scheme:
This was the solution:
Kicker → Printers → Add Printer → Select a Printer to Add → Manual URI → Connection → bluetooth://001A0EEC22A2/