Calcium silicate board above the watermark is how to cause
Calcium silicate board on the watermark is its wet embryo state, into the autoclave in the high temperature autoclaved curing process, the reaction of calcium silicate to form teromorelite crystals and water vapor in the surface condensation formation.
Yellow whirring, and generally the reasons for the use of kraft paper fiber, dry after generally not anti-color, but I suggest you use sanded calcium silicate board, such problems will be less.
