This subclass covers also pulp compositions for the preparation of fibreboard or other fibrous articles by wet processes. [5]
In this subclass, the following terms are used with the meaning indicated:
"pulp" means a dispersion comprising paper-making fibres and optional additives, which is to be processed, and covers the term "stock"; it also means dry paper-making fibres which are to be made into paper by either wet or dry processes; [5]
"paper" means paper, cardboard or wet-laid non-woven fabrics.
If a pulp composition or a paper, or a constituent thereof, is characterised by more than one feature provided for in this subclass, for example, by both the fibrous material and a coating or by both a colorant and a water-repelling agent, classification is made in all places providing for these features. [8]
Processes using enzymes or micro-organisms in order to:
liberate, separate or purify a pre-existing compound or composition, or to
treat textiles or clean solid surfaces of materials
Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only [5]
P:20
D21H 13/00
Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (chemical features in the manufacture of artificial fibres Fulltext... Hierarchy... Expanded...D01F) [5]
P:10
D21H 15/00
Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution [5]
P:60
D21H 17/00
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution [5]
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 (coatings characterised by a special visual effect Fulltext... Hierarchy... Expanded...D21H 19/00) [5]
Special paper not otherwise provided for, e.g. made by multi-step processes [5]
D21H 27/00
Note(s)
This group provides for the classification of paper with special properties or applications which are only partially or not at all provided for elsewhere in the classification. Whenever possible, however, these papers are classified according to the criteria used in the other groups of this subclass. [5]