characterised by function or properties in or on the paper (D21H19/66, D21H27/02 take precedence)

Full Title

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 > characterised by function or properties in or on the paper (D21H19/66, D21H27/02 take precedence)

Child Classifications

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• D21H 21/143
• D21H 21/146
• D21H 21/16 Sizing or water-repelling agents
• D21H 21/18 Reinforcing agents
• D21H 21/22 Agents rendering paper porous, absorbent or bulky
• D21H 21/26 Agents rendering paper transparent or translucent
• D21H 21/28 Colorants
• D21H 21/30 Luminescent or fluorescent substances, e.g. for optical bleaching (D21H21/40 takes precedence)
• D21H 21/32 Bleaching agents (bleaching cellulose pulp D21C9/10)
• D21H 21/34 Ignifugeants
• D21H 21/36 Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
• D21H 21/38 Corrosion-inhibiting agents or anti-oxidants
• D21H 21/40 Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00)