Writing paper - AbsoluteAstronomy.com

Printing and writing papers are paper

Paper

Paper is a thin material mainly used for writing upon, printing upon, drawing or for packaging. It is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets....

grades used for newspaper

Newspaper

A newspaper is a scheduled publication containing news of current events, informative articles, diverse features and advertising. It usually is printed on relatively inexpensive, low-grade paper such as newsprint. By 2007, there were 6580 daily newspapers in the world selling 395 million copies a...

s, magazine

Magazine

Magazines, periodicals, glossies or serials are publications, generally published on a regular schedule, containing a variety of articles. They are generally financed by advertising, by a purchase price, by pre-paid magazine subscriptions, or all three...

s, catalogs, book

Book

A book is a set or collection of written, printed, illustrated, or blank sheets, made of hot lava, paper, parchment, or other materials, usually fastened together to hinge at one side. A single sheet within a book is called a leaf or leaflet, and each side of a leaf is called a page...

s, commercial printing

Printing

Printing is a process for reproducing text and image, typically with ink on paper using a printing press. It is often carried out as a large-scale industrial process, and is an essential part of publishing and transaction printing....

, business forms, stationeries

Stationery

Stationery has historically meant a wide gamut of materials: paper and office supplies, writing implements, greeting cards, glue, pencil case etc.-History of stationery:...

, copying

Copying

Copying is the duplication of information or an artifact based only on an instance of that information or artifact, and not using the process that originally generated it. With analog forms of information, copying is only possible to a limited degree of accuracy, which depends on the quality of the...

and digital printing

Digital printing

Digital printing refers to methods of printing from a digital based image directly to a variety of media. It usually refers to professional printing where small run jobs from desktop publishing and other digital sources are printed using large format and/or high volume laser or inkjet printers...

. About 1/3 of the total pulp and paper marked (in 2000) is printing and writing papers.

Writing paper standards

Specifications	MD/CD	Unit Units of measurement A unit of measurement is a definite magnitude of a physical quantity, defined and adopted by convention and/or by law, that is used as a standard for measurement of the same physical quantity. Any other value of the physical quantity can be expressed as a simple multiple of the unit of...	Level Level Level or levels may refer to:-Places:Levél, Győr-Moson-Sopron, HungaryLevel, Ohio, United StatesLevel ValleyLevels, West Virginia-Engineering-related:*Floor, or storey, of a building or a mine... A	Level Level Level or levels may refer to:-Places:Levél, Győr-Moson-Sopron, HungaryLevel, Ohio, United StatesLevel ValleyLevels, West Virginia-Engineering-related:*Floor, or storey, of a building or a mine... B	Method Methodology Methodology is generally a guideline for solving a problem, with specificcomponents such as phases, tasks, methods, techniques and tools . It can be defined also as follows:...
Substance Substance Substance may refer to:Chemical substance, a material with a definite chemical compositionDrug substanceMatter, the substance of which all physical objects are madeSubstance theory, theory positing that a substance is distinct from its properties....		gsm	80-120	60-80	TCVN 1270:2000
Durable Durable Durability is the ability to endure. It can refer to:Durable goods, goods with a long usable life in economics.Durability , one of the ACID properties.In safety and technology:Dust resistantFire resistant*Rot-proof... ≥		mN.m²/g			TCVN 3229:2000
	MD		5.7	4.1
	CD
Tearing Tearing Tearing is the act of breaking apart a material by force, without the aid of a cutting tool. A tear in a piece of paper, fabric, or some other similar object may be the result of the intentional effort with one's bare hands, or be accidental... strength ≥		m			TCVN 1862:2000
	MD		3800	3200
	CD		2200	1800
Water Water Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a... absortiveness Cobb CobB CobB is a bacterial protein that belongs to the sirtuin family, a broadly conserved family of NAD+-dependent protein deacetylases.... 60		g/m²	23	23	TCVN 6726:2000
Brightness Brightness Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target... ISO ≥		%	78	70	TCVN 1865:2000
Opacity Opacity (optics) Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc... ≥		%	85	85	TCVN 6728:2000
Roughness Bendtsen ≥		ml/ minute Minute A minute is a unit of measurement of time or of angle. The minute is a unit of time equal to 1/60th of an hour or 60 seconds. In the UTC time scale, a minute on rare occasions has 59 or 61 seconds; see leap second. The minute is not an SI unit; however, it is accepted for use with SI units...	280	400	TCVN 3226:2001
Ash Wood ash Wood ash is the residue powder left after the combustion of wood. Main producers of wood ash are wood industries and power plants.-Composition:... content ≥		%	3	3	TCVN 1864:2001
Moisture Moisture Humidity is the amount of moisture the air can hold before it rains. Moisture refers to the presence of a liquid, especially water, often in trace amounts... content		%	7+/-1	7+/-1	TCVN 1867:2001

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