Printing and writing paper

Ancient Sanskrit on Hemp based Paper. Hemp Fiber was commonly used in the production of paper from 200 BCE to the Late 1800's.

Printing and writing papers are paper grades used for newspapers, magazines, catalogs, books, commercial printing, business forms, stationeries, copying and digital printing. About 1/3 of the total pulp and paper marked (in 2000) is printing and writing papers. The pulp or fibers used in printing and writing papers are extracted from wood using a chemical or mechanical process.

In the United States printing and writing papers are separated into four main categories:

1. Uncoated Freesheet Paper
2. Uncoated Mechanical Paper
3. Coated Freesheet Paper
4. Coated Mechanical Paper

Writing paper standards

Specifications	MD/CD	Unit	Level A	Level B	Method
Substance		gsm	80-120	60-80	TCVN 1270:2000
Durable ≥		mN.m²/g			TCVN 3229:2000
	MD		5.7	4.1
	CD
Tearing strength ≥		m			TCVN 1862:2000
	MD		3800	3200
	CD		2200	1800
Water absortiveness Cobb 60		g/m²	23	23	TCVN 6726:2000
Brightness ISO ≥		%	78	70	TCVN 1865:2000
Opacity ≥		%	85	85	TCVN 6728:2000
Roughness Bendtsen ≥		ml/ minute	280	400	TCVN 3226:2001
Ash content ≥		%	3	3	TCVN 1864:2001
Moisture content		%	7±1	7±1	TCVN 1867:2001

Types

• Fine paper
• Machine finished coated paper
• Newsprint