pahvia
Pahvia is the Finnish term for a thick paper-based board used in packaging and crafts. In English, it is commonly referred to as cardboard or paperboard. Pahvia sheets are produced from cellulose fibres derived from wood pulp, often supplemented by recycled fibres. There are two main families: paperboard (solid board) and corrugated cardboard. Paperboard includes folding cartons and cereal boxes with thickness typically measured in grams per square metre (gsm) or micrometres; corrugated cardboard consists of a fluted core sandwiched between two linerboard surfaces and is valued for stiffness and cushioning.
For manufacturing, pulp is refined, formed into sheets, and sometimes coated to improve surface finish and printability.
Common applications include consumer packaging, shipping cartons (for corrugated), display boards, and arts and crafts. Pahvia
Environmental considerations: cardboard is generally recyclable and widely accepted in municipal recycling streams. Recycled content and
Historical note: The use of cardboard dates to the 19th century, with corrugated cardboard becoming prominent