![]() The result showed that the average of overall density was about of 1.41 g/cm 3, moisture content of 9.12%, water absorption of 25.21% and thickness swelling about of 1.91% which meets the standard limits required by SNI No. This experimental model used Completely Randomized Design (CRD) and assessment the quality by control chart evaluated using 3-sigma control limits through the Upper Control Limit (UCL) and lower control limit (LCL). The material used was composite board in the form of gypsum-kalsiboard panels with length of 244.0 cm, width of 122.0 cm and thickness of 3.5 mm. The objectives of this research were to analyse the physical properties and quality assessment of Gypsum Kalsiboard in the Ambon city market so that the physical properties of the boards and their quality are analysed and controlled.
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