The present invention relates to a method of draining water comprising the steps of: providing a water drainage device, wherein the water drainage device comprises man-made vitreous fibres (MMVF) bonded with a cured aqueous binder composition; positioning the water drainage device in contact with the ground, wherein the water drainage device absorbs water and releases water to a recipient wherein the aqueous binder composition prior to curing comprises; a component (i) in form of one or more oxidized lignins; a component (ii) in form of one or more cross-linkers.

The present invention relates to the use of optical fibres comprising a boron nitride (BN)-based coating, in a method for the additive manufacturing of ceramic structures. The present invention also relates to ceramic structures obtained by additive manufacturing comprising an optical component comprising one or more optical fibres as defined above.

The present invention relates to the use of optical fibres comprising a boron nitride (BN)-based coating, in a method for the additive manufacturing of ceramic structures. The present invention also relates to ceramic structures obtained by additive manufacturing comprising an optical component comprising one or more optical fibres as defined above.