Chemical wood pulp, sulphite, other than dissolving grades

HS v2017 Code: 4704

About chemical wood pulp, sulphite, other than dissolving grades

HS code 4704 covers the classification of chemical wood pulp produced using the sulphite process, excluding dissolving grades. This industry plays a crucial role in the global paper and paperboard manufacturing supply chain, providing a key raw material for the production of various paper products. The sulphite pulping process is an important alternative to the more widely used kraft pulping method, offering unique properties and applications for the resulting pulp.

Production process

The production of chemical wood pulp under HS code 4704 involves the sulphite pulping process. This process uses a cooking liquor containing sulfite ions to break down the lignin in wood, separating the cellulose fibers. The wood is typically chipped and then cooked under pressure in the sulphite liquor, which dissolves the lignin and leaves the cellulose fibers intact. The resulting pulp is then washed, screened, and may undergo further processing, such as bleaching, to meet the desired specifications.

Production inputs

The main inputs required for the production of chemical wood pulp under HS code 4704 include raw wood materials, typically softwood species such as spruce, fir, or pine. The sulphite cooking liquor, which contains sulfite ions, is another critical input. Additionally, the process requires specialized equipment, such as digesters, washers, and screening systems, as well as energy sources and water for the various stages of production.

Production outputs

The primary output of the industry covered by HS code 4704 is chemical wood pulp produced using the sulphite process, excluding dissolving grades. This pulp is a key input for the production of various paper and paperboard products, including printing and writing papers, tissue papers, and specialty papers. The output of this industry may be consumed by manufacturers classified under 4801 Newsprint, in rolls or sheets, 4802 (Uncoated paper and paperboard, of a kind used for writing, printing or other graphic purposes, and non-perforated punch-cards and punch tape paper, in rolls or rectangular (including square) sheets, of any size), and 4803 Toilet or facial tissue stock, towel or napkin stock and similar paper of a kind used for household or sanitary purposes, cellulose wadding and webs of cellulose fibers, whether or not creped, crinkled, embossed, perforated, surface-colored, surface-decorated or printed, in rolls or sheets.

Family tree for chemical wood pulp, sulphite, other than dissolving grades

    graph LR
    A["<a href='/classifications/hs/v2017/47'>47: Pulp of wood or other fibrous cellulosic material; recovered (waste and scrap) paper or paperboard</a>"]
A --> B["<a href='/classifications/hs/v2017/4704'>4704: Chemical wood pulp, sulphite, other than dissolving grades</a>"]

    A --> C["<a href='/classifications/hs/v2017/4701'>4701: Wood pulp, mechanical wood pulp</a>"]
A --> D["<a href='/classifications/hs/v2017/4702'>4702: Chemical wood pulp, dissolving grades</a>"]
A --> E["<a href='/classifications/hs/v2017/4703'>4703: Chemical wood pulp, soda or sulphate, other than dissolving grades</a>"]
A --> F["<a href='/classifications/hs/v2017/4705'>4705: Wood pulp obtained by a combination of mechanical and chemical pulping processes</a>"]
A --> G["<a href='/classifications/hs/v2017/4706'>4706: Pulps of fibres derived from recovered (waste and scrap) paper or paperboard or of other fibrous cellulosic material</a>"]
A --> H["<a href='/classifications/hs/v2017/4707'>4707: Waste and scrap of paper and paperboard</a>"]

    B --> I["<a href='/classifications/hs/v2017/470411'>470411: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), unbleached, of coniferous wood</a>"]
B --> J["<a href='/classifications/hs/v2017/470419'>470419: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), unbleached, of non-coniferous wood</a>"]
B --> K["<a href='/classifications/hs/v2017/470421'>470421: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), semi-bleached or bleached, of coniferous wood</a>"]
B --> L["<a href='/classifications/hs/v2017/470429'>470429: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), semi-bleached or bleached, of non-coniferous wood</a>"]


    %% Color coordination by level

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level4
class D level4
class E level4
class F level4
class G level4
class H level4
class I level6
class J level6
class K level6
class L level6

  class B highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class B highlight