Method and apparatus for coating paper board and paper with high- viscosity coating mixes

An apparatus for coating a paper or a paper board web, comprising:

• a nozzle applicator for spreading coating mix having a solids content of 55-75% on a surface of the web to form a coating layer on the web;
• a doctor element for levelling and metering the spread coating mix on the surface of the web, the doctor element being capable of producing a hydrodynamic doctoring force on the coating layer between the doctor element and the web and being located downstream of the applicator so that a dwell time between the spreading of the coating mix and the metering is 72-2400 ms at a web speed of 100-1000 m/min. and so that fibers of the web swell prior to metering by the doctor element;
• and
• at least one backing element for supporting the web.