| 摘要 |
<p>A soil resistant paper substrate is made from a stock comprising a suspension of paper fibres and treated with microfibrillated cellulose such that the microfibrillated cellulose bridges pore spaces formed by and in between the paper fibres in at least a surface of the substrate to provide soil resistance. The microfibrillated cellulose may be produced from cotton pulp or wood pulp, and may be added to the stock or applied as a coating before or after printing. The coat weight may be 0.1 to 5 gsm, and may have a solids content of 0.1 to 2% weight for weight. The length of the fibres may be up to 100 microns, and their width may 1 to 100nm. The paper may form a security paper with an overt security feature.</p> |
