GB/T 451.2-2002 English PDF (GB/T451.2-2002)

GB/T 451.2-2002: Paper and board -- Determination of grammage
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GB/T 451.2-2002
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 85.060
Y 32
eqv ISO 536.1995
Replacing GB/T 451.2-1989
Paper and board - Determination of grammage
ISSUED ON. JUNE 13, 2002
IMPLEMENTED ON. DECEMBER 1, 2002
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine
3. No action is required - Full-copy of this standard will be automatically and
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3 
ISO Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Definition ... 5 
4 Principle... 5 
5 Apparatus ... 6 
6 Sampling ... 7 
7 Conditioning ... 7 
8 Test procedures ... 7 
9 Expression of results ... 7 
10 Test report ... 8 
Foreword
This Standard is a revision to GB/T 451.2-1989 Paper and board -
Determination of basic weight.
This Standard equivalently adopts ISO 536.1995 Paper and board -
Determination of grammage.
Since the date of implementation of this Standard, it shall replace GB/T
451.2-1989 simultaneously.
This Standard was proposed by China Light Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Paper Industry of Standardization Administration of China.
The drafting organization of this Standard. China Pulp and Paper Research
Institute.
Main drafters of this Standard. Liu Lianxiang, Ma Xin.
This Standard entrusts National Technical Committee on Paper Industry of
Standardization Administration of China for interpretation.
ISO Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a
technical committee has been established has the right to be represented on
that committee. international organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work ISO
collaborates closely with the International Electrotechnical commission (IEC)
on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75% of the member bodies casting a
vote.
International Standard ISO 536 was prepared by Technical Committee
ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and
quality specifications for paper and board.
This second edition cancels and replaces the first edition (ISO 536.1976),
which has been technically revised.
Annex A forms an integral part of this Standard. Annex B is for information
only.
Paper and board - Determination of grammage
1 Scope
This Standard specifies a method of determining the grammage of paper and
board.
This Standard applies to various papers and boards.
2 Normative references
The following standards contain provisions which, through reference in this
text, constitute provisions of this Standard. At the time of publication, the
editions indicated were valid. All standards are subject to revision, and parties
to agreements based on this Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated
below.
GB/T 450-2002, Paper and board - Sampling for testing (eqv ISO
186.1994)
GB/T 10739-2002, Paper, board and pulps - Standard atmosphere for
conditioning and testing (eqv ISO 187.1990)
3 Definition
For the purposes of this document, the following definition apply.
3.1 grammage
Mass of a unit area of paper or board determined by a specific method of test.
Grammage is expressed in grams per square metre.
4 Principle
The area of the test pieces and their masses are determined and the
grammage is calculated.
GB/T 451.2-2002
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 85.060
Y 32
eqv ISO 536.1995
Replacing GB/T 451.2-1989
Paper and board - Determination of grammage
ISSUED ON. JUNE 13, 2002
IMPLEMENTED ON. DECEMBER 1, 2002
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine
3. No action is required - Full-copy of this standard will be automatically and
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3 
ISO Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Definition ... 5 
4 Principle... 5 
5 Apparatus ... 6 
6 Sampling ... 7 
7 Conditioning ... 7 
8 Test procedures ... 7 
9 Expression of results ... 7 
10 Test report ... 8 
Foreword
This Standard is a revision to GB/T 451.2-1989 Paper and board -
Determination of basic weight.
This Standard equivalently adopts ISO 536.1995 Paper and board -
Determination of grammage.
Since the date of implementation of this Standard, it shall replace GB/T
451.2-1989 simultaneously.
This Standard was proposed by China Light Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Paper Industry of Standardization Administration of China.
The drafting organization of this Standard. China Pulp and Paper Research
Institute.
Main drafters of this Standard. Liu Lianxiang, Ma Xin.
This Standard entrusts National Technical Committee on Paper Industry of
Standardization Administration of China for interpretation.
ISO Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a
technical committee has been established has the right to be represented on
that committee. international organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work ISO
collaborates closely with the International Electrotechnical commission (IEC)
on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75% of the member bodies casting a
vote.
International Standard ISO 536 was prepared by Technical Committee
ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and
quality specifications for paper and board.
This second edition cancels and replaces the first edition (ISO 536.1976),
which has been technically revised.
Annex A forms an integral part of this Standard. Annex B is for information
only.
Paper and board - Determination of grammage
1 Scope
This Standard specifies a method of determining the grammage of paper and
board.
This Standard applies to various papers and boards.
2 Normative references
The following standards contain provisions which, through reference in this
text, constitute provisions of this Standard. At the time of publication, the
editions indicated were valid. All standards are subject to revision, and parties
to agreements based on this Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated
below.
GB/T 450-2002, Paper and board - Sampling for testing (eqv ISO
186.1994)
GB/T 10739-2002, Paper, board and pulps - Standard atmosphere for
conditioning and testing (eqv ISO 187.1990)
3 Definition
For the purposes of this document, the following definition apply.
3.1 grammage
Mass of a unit area of paper or board determined by a specific method of test.
Grammage is expressed in grams per square metre.
4 Principle
The area of the test pieces and their masses are determined and the
grammage is calculated.