D21H5/0012 - CPC Classification

Special paper or cardboard not otherwise provided for; Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours

• D21H5/0015 » {only one side of the paper being in contact with the treating medium, e.g. paper carried by support} 3
• D21H5/002 » {the paper being at least partly surrounded by treating medium on both sides} 0