What is kraft paper

What Kraft Paper Is

Kraft paper is a strong, water-resistant paper with a brownish-yellow hue, commonly used in packaging and industrial applications. It is made from wood pulp and has high tensile strength, burst resistance, and durability under tension and pressure.

Common Uses in Packaging and Industry

Typical applications include paper bags, envelopes, workbooks, record sleeves, file folders, sandpaper, and printing press drum linings. It is also used as a base for protective packaging such as honeycomb paper and paper bubble wrap.

Basis Weight and Physical Specifications

Kraft paper has a basis weight range from 80 g/m² to 120 g/m². The thickness and strength vary depending on the intended use, with heavier weights offering greater rigidity and cushioning.

Types Based on Surface and Finish

Kraft paper is available in single-sided gloss, double-sided gloss, striped, and grain-free varieties. These finishes affect surface smoothness and suitability for printing or handling.

Classification by Function and Material

It is classified by use into waterproof, moisture-proof, anti-rust, insulating, pattern-making, process, and kraft sticker types. By material, it includes recycled kraft, kraft core, kraft base, rough, wax-coated, wood pulp, and composite kraft paper.

Color Variations and Consistency

Kraft paper typically retains a yellowish-brown color. Variations in color can occur due to raw material sources, production batches, seasons, and machines. Same-batch rolls generally maintain 98% color consistency.

Roll and Sheet Dimensions

Flat paper sizes include standard printing dimensions such as 787*1092mm (positive) and 889*1194mm (generous). Roll widths can be slit from 460mm to 1460mm using a standard slitting machine, with custom cuts possible through flat cutting.