1. Switch off the Touchmate tab.
2. Now press the power button, as soon as Touchmate logo appears keep pressing the volume up button and press and release the volume down button 4 to 5 times.
3. Then Android symbol with exclamation will appear. Now here press the volume up and power button together to enter into the recovery menu.
4. In the appear menu select the option wipe data/ factory reset.
5. Then select delete all user data.
Hard reset the tablet if you have forgotten the pattern password or if the tablet hangs frequently. For more info on hard reset see above link