Laminated Board is manufactured according to the IEC standard 60763-3-1, Types LB3.1.1 and 3.1.2 at the Rapperswil plant in Switzerland. The resins used are casein and polyester. Casein is an aqueous and polyester resin a non-aqueous glue. We strongly recommend polyester resin glue for thicknesses >30.0 mm. When using casein glue for a thickness >30.0 mm, cracks can appear due to the increased water content. - The density of laminated Transformer board TIV is a maximum of 1.30 g/cubic cm. The moisture content of Laminated board with casein glue averages 8%, Laminated board with polyester resin glue is controlled at 2% to 6%, depending on the requirements. Laminated board can be classified as a high-density material.