GYPSUM plasterboards are produced from high purity natural gypsum core being sheeted in a closely adhering best selected special cardboard. Plaster mix with some chemical additives into a high speed mixer is discharged continuously between a lower and an upper endless cardboard which passes over a forming table, cutting in requisite length, feeds into a dryer followed by trimming and wrapping of bundles. GYPSUM board is a high quality fire-resistive building material where we give more than 90 minutes fire-resistance rating according to report.