METHOD OF PRODUCING A PAPER HAVING A THREE-DIMENSIONAL PATTERN AND PAPER PRODUCED BY THE METHOD
Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions which is given the paper in connection with impulse drying. The paper web has a varying material composition as seen in its thickness direction, so that it at least in an outer layer contains an amount of a material that softens, melts or hardens in the temperature interval 100-400 DEG C or in some other way contributes in stabilizing the pattern structure that has been given the paper. It is further referred to an impulse-dried paper produced according to the method.