Chemical wood pulp, sulphite, other than dissolving grades
HS v2022 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 process, 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 utilizes a cooking liquor containing sulfur dioxide and bisulfite ions to break down the lignin in wood chips, separating the cellulose fibers. The wood chips are cooked under heat and pressure, with the resulting pulp then washed, screened, and sometimes bleached to produce the final product.
Production inputs
The main inputs required for the production of HS code 4704 chemical wood pulp include wood chips, typically sourced from softwood species such as spruce, fir, or pine. The sulphite cooking liquor, composed of sulfur dioxide and bisulfite compounds, is another critical input. Additionally, the process requires specialized pulping equipment, including digesters, washers, and screening systems.
Production outputs
The primary output of HS code 4704 is chemical wood pulp, which is then consumed by the paper and paperboard manufacturing industry to produce a wide range of products, such as 4801 Newsprint, 4802 Uncoated paper and paperboard, and 4803 Toilet or facial tissue stock, towel or napkin stock. The sulphite pulp produced under this code may also find applications in the production of specialty papers, such as those used for writing, printing, or packaging.
Family tree for chemical wood pulp, sulphite, other than dissolving grades
graph LR
A["<a href='/classifications/hs/v2022/47'>47: Pulp of wood or other fibrous cellulosic material; recovered (waste and scrap) paper or paperboard</a>"]
A --> B["<a href='/classifications/hs/v2022/4704'>4704: Chemical wood pulp, sulphite, other than dissolving grades</a>"]
A --> C["<a href='/classifications/hs/v2022/4701'>4701: Wood pulp, mechanical wood pulp</a>"]
A --> D["<a href='/classifications/hs/v2022/4702'>4702: Chemical wood pulp, dissolving grades</a>"]
A --> E["<a href='/classifications/hs/v2022/4703'>4703: Chemical wood pulp, soda or sulphate, other than dissolving grades</a>"]
A --> F["<a href='/classifications/hs/v2022/4705'>4705: Wood pulp obtained by a combination of mechanical and chemical pulping processes</a>"]
A --> G["<a href='/classifications/hs/v2022/4706'>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/v2022/4707'>4707: Waste and scrap of paper and paperboard</a>"]
B --> I["<a href='/classifications/hs/v2022/470411'>470411: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), unbleached, of coniferous wood</a>"]
B --> J["<a href='/classifications/hs/v2022/470419'>470419: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), unbleached, of non-coniferous wood</a>"]
B --> K["<a href='/classifications/hs/v2022/470421'>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/v2022/470429'>470429: Wood pulp; chemical wood pulp, sulphite, (other than dissolving grades), semi-bleached or bleached, of non-coniferous wood</a>"]
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