板紙|いたがみitagami[0]heiban (flat)

1. nouncardboard; paperboard; pasteboard

• Synonym厚紙あつがみNeutralThick paper: stresses being thicker than ordinary paper, so it covers a wider range than 「板紙」 and need not be stiff or hard.
• Synonymボール紙ボールがみNeutralThick, stiff cardboard, synonymous with 「板紙」 but more common in everyday use; fine for making boxes, crafts and the like.

For thick, stiff cardboard, 「板紙」 is the term but leans industry jargon; in everyday use say 「ボール紙」 or 「厚紙」. Corrugated cardboard is 「段ボール」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 厚あつく固かたい洋紙ようし。ボール紙ぼーるがみ。
2. 魚さかななどを調理ちょうりする際さいに俎板まないたに敷しく紙かみ。