Education and research is being Develop material that is mixed between rubber and rubber tree’s leaf for product designing. For product design This study is the use of a water timber with a rubber material. For use in ...

This research aims to develop the ceiling board mixed with coconut coir. The 5 ratios of gypsum plaster: coconut coir: sodium silicate: tap water are equal to 1 : 0 : 1: 0.03, 1: 100: 1: 0.03, 1: 150: 1: 0.03, 1: 200: 1: ...