Method for manufacture of paper or board and paper or board obtained by the method

A method for manufacture of paper or board, where a fiber web is formed from an aqueous suspension of fibers, the method comprising:

• providing an aqueous fiber suspension, which comprises at least 50 weight-% of recycled fiber material and/or coated broke, based on dry paper or board;
• optionally diluting the aqueous fiber suspension;
• adding to the fiber suspension having consistency of above 20 g/l an inverted solution of cationic polymer,
• the inverted solution of cationic polymer having a bulk viscosity of 50 to 150 mPas at 0.2 weight-% cationic polymer concentration, and comprising a reverse phase emulsion of a branched or unbranched cationic polymer having a standard viscosity of 1.5-3.5 mPas measured by Brookfield viscometer with UL adapter at 25° C. on a 0.1% by weight, polymer solution in 1 M NaCl, and said cationic polymer being obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 20-40 mol-% cationic monomers, optionally at most 50 ppm of a crosslinking agent;
• delivering the aqueous fiber suspension to a headbox, draining the aqueous fiber suspension on a wire screen to form a wet fibrous web;
• and
• pressing and drying the wet fibrous web to obtain a web of paper or board.