Paper, paperboard, or label stock coated with a synthetic nano-composite coating. A synthetic nano-composite coating includes a first component including a fibrous structured amorphous silica structure, and a second component including a precipitated calcium carbonate structure developed by pressure carbonation.

The present disclosure relates to a coating composition comprising calcium silicate and precipitated calcium carbonate particulate material, a suspension comprising the coating composition and at least one solvent, an article which is at least partially coated with the coating composition or the suspension, and a process for producing an article, wherein the article is at least partially coated with the suspension, and use of the coating composition comprising calcium silicate and precipitated calcium carbonate particulate material.

A nano-composite structure. A synthetic nano-composite is described having a first component including a fibrous structured amorphous silica structure, and a second component including a precipitated calcium carbonate structure developed by pressure carbonation. The nano-composite may be useful for fillers in paints and coatings. Also, the nano-composite may be useful in coatings used in the manufacture of paper products.

Composite pigments are provided which comprise a mineral pigment (such as kaolin clay, titanium dioxide, talc, mica or a mixture of two or more of these mineral pigments) and calcium carbonate precipitated in-situ on the surfaces of the particles of the mineral pigment.