Paper with heavier weight is also referred to as card stock since this type of paper is best for printing business cards, postcards, greeting cards–media that need the extra sturdiness. … When selecting heavyweight paper, it’s important to make sure your printer can handle the weight you are feeding it.
Herein, what is heavyweight copy paper?
Product overview. This heavyweight premium matte paper quickly fills all your in-house printing needs. It conveniently works with almost any printer and features a flat finish designed to support double-sided printing.