Formulation for a fibrous non-woven facing material

A formulation for a fibrous non-woven facing material, wherein the formulation comprises:

• (i) a binder;
• (ii) a filler;
• and
• (iii) an extender;
• wherein a median particle size, d50, of the extender is equal to or less than 3.5 μm, and wherein the extender has a non-spherical morphology;
• wherein a median particle size, d50, of the filler is equal to or less than 3.0 μm and wherein the filler has a d10 equal to or less than 1.0 μm and a d90 equal to or less than 6.0 μm;
• wherein a weight ratio based on dry solids of the binder to a sum of the extender and the filler is from 0.05:1 to 7:2;
• wherein a weight ratio based on dry solids of the extender to the filler is from 0.05:1 to 18:1;
• wherein the formulation comprises less than 13 wt % titanium dioxide on a dry solids basis;
• wherein the formulation has a total solids content of from 30 to 85%;
• and
• wherein the formulation is free of a pigment having a refractive index of 2.5 or more.