Method for targeted delivery of additives to varying layers in a glass reinforced gypsum panel and method of manufacture

摘要

A method of manufacture of multilayer gypsum board, comprises mixing an additive into first gypsum slurry before depositing the slurry 38 on to a continuous fibre sheet 18, then providing and evenly distributing over the sheet 18 second gypsum slurry 44 with a different consistency from the first slurry 38.