Non-fibrous material added to the pulp, characterised by its function, form or properties Paper-impregnating or coating material, characterised by its function, form or properties

DTEXTILES PAPER D21Papermaking D21HPULP COMPOSITIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D IMPREGNATING OR COATING OF PAPER TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G PAPER NOT OTHERWISE PROVIDED FOR

D21H21/00Non-fibrous material added to the pulp, characterised by its function, form or properties Paper-impregnating or coating material, characterised by its function, form or properties

D21H21/02Agents for preventing deposition on the paper mill equipment D21H21/04Slime-control agents D21H21/06Paper forming aids D21H21/08Dispersing agents for fibres D21H21/10Retention agents or drainage improvers D21H21/12Defoamers D21H21/14characterised by function or properties in or on the paper D21H21/143Agents preventing ageing of paper D21H21/146Crêping adhesives D21H21/16Sizing or water-repelling agents D21H21/18Reinforcing agents D21H21/20Wet strength agents D21H21/22Agents rendering paper porous, absorbent or bulky D21H21/24Surfactants D21H21/26Agents rendering paper transparent or translucent D21H21/28Colorants; Pigments or opacifying agents D21H21/285insoluble D21H21/30Luminescent or fluorescent substances D21H21/32Bleaching agents D21H21/34Ignifugeants D21H21/36Biocidal agents D21H21/38Corrosion-inhibiting agents or anti-oxidants D21H21/40Agents facilitating proof of genuineness or preventing fraudulent alteration D21H21/42Ribbons or strips D21H21/44Latent security elements D21H21/46Elements suited for chemical verification or impeding chemical tampering D21H21/48Elements suited for physical verification D21H21/50characterised by form D21H21/52Additives of definite length or shape D21H21/54being spherical D21H21/56Foam