Abstract: A process for preparing a master batch, comprising: the step of filtrating a dispersion of cellulose nanofibers under pressure or under reduced pressure with a filtration pressure differential of 0.01 MPa or more; and the step of mixing cellulose nanofibers obtained by the filtration step and rubber component is provided. A master batch can be provided to provide a rubber composition with improved mechanical strengths by the invention.

Abstract: The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability. According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.

Abstract: The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability. According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.

Abstract: The present invention provides a process for preparing a coated printing paper, comprising the steps of making a base paper from a stuff containing a hardwood-derived mechanical pulp (LMP) and applying a coating solution containing a pigment and an adhesive by an on-machine coater to provide a coating layer, wherein said steps are continuously performed on machine. According to the present invention, coated printing papers having high quality can be efficiently prepared with high runnability.

Abstract: The present invention provides a process for preparing a coated printing paper, comprising the steps of making a base paper from a stuff containing a hardwood-derived mechanical pulp (LMP) and applying a coating solution containing a pigment and an adhesive by an on-machine coater to provide a coating layer, wherein said steps are continuously performed on machine. According to the present invention, coated printing papers having high quality can be efficiently prepared with high runnability.