Legacy Fortran Punch Card Paperboard
Heavyweight bleached kraft paperboard sheets, kaolin-coated, cut into cards or strips for Fortran programming punchcard input to old mainframes. Over 150 g/m² with chemical process fibers >95%, unpunched for custom encoding. Ideal for archival computing restoration projects.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sulfite wrapping paper specs
>40% sulfite fibers, ash ≤8%, burst index ≥1.47 kPa·m²/g classifies as 4805.30.
If cut to size, not for punch machines
Heading 4820 excludes loose sheets, but non-machine specific use applies here.
If self-adhesive coating added
Kaolin plus adhesive binder changes to 4811 for gummed/coated paper.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• For restoration use, attach affidavits of end-use as punchcard stock to counter 4820 loose sheet claims
• Sample testing for uniform bleaching; non-uniform shifts to 4810.39
Related Products under HTS 4810.32.30.00
IBM 5081 Punch Card Stock in Strips
Coated bleached kraft paperboard cards in continuous strips, compatible with IBM 5081 punchcard systems for mainframe data entry. Uniformly bleached with >95% chemical pulp, >150 g/m², kaolin-coated for durability and printability before punching. Not pre-punched, intended for punchcard machine processing.
Kraft Bleached Punchcard Machine Cards
These are rectangular cards made from bleached kraft paperboard, coated with kaolin on one or both sides, weighing over 150 g/m² with over 95% chemical wood fibers. Designed specifically as blank, unpunched cards for punchcard machines used in data processing. They may be supplied in strips for easy loading into legacy computing systems.
Unpunched 80-Column Punchcard Blanks
Standard 80-column rectangular cards from kaolin-coated bleached kraft paperboard (>150 g/m², >95% chemical wood fibers), for punchcard tabulating machines. Blank surface allows custom printing; supplied flat or in fan-fold strips. Meets legacy data processing requirements without pre-perforation.
Fan-Fold Punchcard Strip Stock
Continuous fan-fold strips of bleached, kaolin-coated kraft cards (>150 g/m², chemical pulp dominant), detachable into individual unpunched cards for punchcard machines. Designed for high-volume data processing in vintage computing environments. Surface-coated for ink receptivity without other binders.