Paper is a thin sheet made of plant fiber, which is used for writing pictures, printing books and newspapers, packaging and so on.

Paper is counted by sheets, so paper is generally divided into: letterpress printing paper, newsprint, offset printing paper, coated paper, book cover paper, bible paper, copy paper, paperboard and so on.

Different classifications of paper functions:

1, packaging paper, printing paper, industrial paper, office paper, cultural paper, household paper and special paper.

Packaging paper: white cardboard, white cardboard, kraft paper, corrugated paper, boxboard paper, tea board paper, sheepskin, chicken skin paper, cigarette paper, silicone oil paper, paper cup (bag) base paper, coated paper, cellophane paper, oil-proof and moisture-proof paper, transparent paper, aluminum foil paper, trademark paper, label paper, fruit bag paper and blackboard paper.

2. Printing paper: coated paper, newsprint, lightweight coated paper, lightweight paper, offset paper, writing paper, bible paper, book paper, kaolin, beige kaolin and ivory kaolin;

3. Industrial paper (mainly special paper for writing and packaging): release paper, carbon paper, insulating paper, filter paper, test paper, capacitor paper, cardboard paper, dust-free paper, impregnated paper, sandpaper and rust-proof paper;

4. Office culture paper: tracing paper, drawing paper, copy paper, art paper, copy paper, fax paper, printing paper, copy paper, photo paper, rice paper, thermal paper, color jet paper, film paper and sulfuric acid paper;

5, household paper: toilet paper, facial tissues, napkins, diapers, wipes;

6. Special paper: decorative base paper, watermark paper, leather paper, gold and silver cardboard, patterned paper and anti-counterfeiting paper.