Abstract: Plasterboard is surfaced with a lining paper which is printed over the whole of one face of the board using an ink containing binder and particulate solid material, applied with a density of print such that under optically examination at least 80% of the surface of the lining paper is covered by the applied print. The particulate material has a d50 denotes a number length mean particle size such that 50% of particles have volume smaller than a sphere of diameter d50. The colour of the printed lining paper can be matched to the colour of a jointing compound used as a filler between the edges of adjacent boards. The material of d50 mean particle size in the range from 1 to 10 micrometers gives the lining paper a surface texture resembling that of jointing compounds and so reduces or removes contrasts, notably in absorbency, reflectance and gloss, between the surface of the boards and the surface of the jointing compound between boards.

Abstract: Plasterboard is surfaced with a lining paper which is printed over the whole of one face of the board using an ink containing binder and particulate solid material, applied with a density of print such that under optically examination at least 80% of the surface of the lining paper is covered by the applied print. The particulate material has a d50 denotes a number length mean particle size such that 50% of particles have volume smaller than a sphere of diameter d50. The colour of the printed lining paper can be matched to the colour of a jointing compound used as a filler between the edges of adjacent boards. The material of d50 mean particle size in the range from 1 to 10 micrometers gives the lining paper a surface texture resembling that of jointing compounds and so reduces or removes contrasts, notably in absorbency, reflectance and gloss, between the surface of the boards and the surface of the jointing compound between boards.