Decades of experience with thousands of exhumations on the national territory have led to the use of the zinc inner shell, with a certain thickness and certain fabrication characteristics, which has proven its efficiency in the field.

Unlike most casings on the market, the zinc inner shell of a funeral coffin must not be resistant, waterproof and indestructible for a long time, but rather disintegrate within a pre-set time and facilitate a quicker body mineralization, at each phase with corrosive chemical reactions and specific material behaviours that are typical of zinc only, as it has been unequivocally demonstrated.