Myself Chalita Jaewtrakul
Cut this soft part of the fruit into small pieces.
Once you ahve small pieces, you can then grind these pieces into even smaller pieces. You may need to wait till they are a littler drier, but you can also try this when they are fresh and soft.
The next step is to boil the soft fruit peel in 200 ml of water for 15 minutes. This will vary depending on the kind of cooker and hob you have.
Drain the water out after the 15 minutes. Again you could save this water to use in a different kind fo material research in the future.
Wait for the mangosteen pulp to cool down a bit. You can then shape the mixture onto a flat area or into a mould.
Leave the formed mangosteen pulp to dry in the form or on the flat surface for a couple of days. The length this takes will vary depending on the temperature and humidity of the room.
The time of year can also affect how fast the material dries.