Magicard 300 Rewrite Settings
Make sure the latest firmware & drivers are being used.
Go to Control Panel -> Hardware and Sound -> Devices and Printers.
Right click on the Magicard printer and select Printing preferences.
Set the Card Front colour format to Monochrome (K-Resin only).
Now navigate to Advanced -> Rewriteable cards -> Define...
Set it up like below:
Choose the Erase/Rewrite option
Erase power to 60 for a cleaner erase.

"Erase now..." can be selected if one or more cards are needed to be cleared.