Industrial Unbleached Kraft Board 400 gsm
Heavy unbleached kraft paperboard, 400 g/m² in sheets, for machinery padding and heavy packaging. Sulfate process ensures strength without coating. Under 4804.51.00.00 as uncoated, unbleached kraft >225 g/m².
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If qualifies as kraftliner with ≥393 kPa burst at 115 g/m² equivalent
Meets strict kraftliner burst specs for 4804.11 over general other kraft.
If fiberboard density >0.8 g/cm³
Denser composition classifies as medium density fiberboard in chapter 44.
If stamped or embossed
Surface treatments like embossing make it a 4821 paper article.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Require supplier specs on fiber process and ash content to affirm unbleached kraft
• Customs may sample for weight; inaccurate declarations lead to penalties
• Separate from printed boards, as printing could shift to chapter 49
Related Products under HTS 4804.51.00.00
Unbleached Kraft Linerboard 300 gsm
Unbleached kraft paperboard in rolls, weighing 300 g/m², made from at least 80% sulfate process wood fibers, used as the outer liner for corrugated boxes. It meets kraftliner specifications with high Mullen bursting strength suitable for heavy-duty packaging. Classified under 4804.51.00.00 as uncoated kraft paperboard over 225 g/m², unbleached, not qualifying as newprint under 4802/4803.
Unbleached Heavy Kraft Paperboard Sheets 250 gsm
Uncoated unbleached kraft paperboard in sheets, 250 g/m², produced via sulfate process for industrial packaging and void fillers. High strength from wood fibers makes it ideal for protective inserts. Falls under 4804.51.00.00 as other uncoated kraft paperboard ≥225 g/m², unbleached.
Unbleached Kraft Testliner 225 gsm Rolls
Unbleached uncoated kraft paperboard rolls at 225 g/m², used as inner liner for corrugated fiberboard boxes. Made predominantly from sulfate wood pulp for burst resistance. HTS 4804.51.00.00 covers this as other unbleached kraft ≥225 g/m².
Unbleached Kraft Packaging Paperboard 275 gsm
Uncoated unbleached kraft paperboard rolls, 275 g/m², for manufacturing rigid boxes and inserts. High tensile strength from chemical sulfate pulp. Fits 4804.51.00.00: other kraft ≥225 g/m², unbleached.
Unbleached Sulfate Kraft Liner 350 gsm Sheets
Sheets of unbleached kraft paperboard, 350 g/m², sulfate process, for top liner in shipping containers. Uncoated for recyclability. HTS 4804.51.00.00 for unbleached other kraft ≥225 g/m².
Heavy Duty Unbleached Kraft Board 500 gsm Rolls
Extra heavy unbleached uncoated kraft paperboard rolls, 500 g/m², for pallet separators and industrial mats. Sulfate fibers provide superior durability. Classified in 4804.51.00.00 as kraft >225 g/m².