GB/T 18107-2017 PDF English
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| GB/T 18107-2017 | English | 940 |
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| GB/T 18107-2000 | English | RFQ |
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GB/T 18107-2017: Hongmu---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18107-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 79.040
B 69
Replacing GB/T 18107-2000
Hongmu
Issued on. DECEMBER 29, 2017
Implemented on. JULY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
Introduction... 7
1 Scope... 8
2 Normative References... 8
3 Terms and Definitions... 8
4 Classification... 10
5 Requirements... 10
6 Test Methods... 10
7 Determination... 11
8 Others... 11
Appendix A (normative) Main Characteristics of Various Categories of Hongmu
... 1
Appendix B (informative) A Table of Hongmu Categories... 1
Appendix C (informative) Red Sandalwood Species and Wood Characteristics
... 5
Appendix D (informative) Rosewood Species and Wood Characteristics... 9
Appendix E (informative) Scented Rosewood Species and Wood
Characteristics... 27
Appendix F (informative) Black Rosewood Species and Wood Characteristics
... 31
Appendix G (informative) Violet Rosewood Species and Wood Characteristics
... 56
Appendix H (informative) Ebony Species and Wood Characteristics... 81
Appendix I (informative) Striped Ebony Species and Wood Characteristics.. 89
Appendix J (informative) Wenge Species and Wood Characteristics... 100
1 Scope
This Standard stipulates the terms and definitions, classification, requirements, test
methods, determination and others of Hongmu.
This Standard is applicable to the production, operation, trade, inspection and
identification of Hongmu and its products.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of dated references, only the dated version applies to this document. In terms of
undated references, the latest version (including all the amendments) applies to this
document.
GB/T 1933 Method for Determination of the Density of Wood
LY/T 1788-2008 Standard Terminology Relating to Wood Properties
3 Terms and Definitions
What is defined in LY/T 1788-2008, and the following terms and definitions are
applicable to this document.
3.1 Hongmu
Hongmu refers to heartwood of Pterocarpus, Dalbergia, Diospyros, Cliffords and
Cassia species, and its structural characteristics, density and wood color (wood color
darkened in the atmosphere) meet the requirements of this Standard.
3.2 Cross Section
Cross section refers to a section perpendicular to the main axis of trunk.
3.5 Growth Ring
Growth ring refers to wood generated within a growth period seen on the cross section.
3.6 Pore
Pore refers to hole on the cross section of a vessel or vascular tracheid, i.e. a cell
cavity.
3.7 Diffuse-porous Wood
Diffuse-porous wood refers to evenly distributed broad-leaved trees with slightly equal
pore diameter throughout the growth ring.
3.8 Axial Parenchyma
Axial parenchyma refers to thin-walled cells with relatively thin cell wall, a long axis
connected into a series, and generally with single pits. It is divided into two types.
detachable and paratracheal.
3.9 Homogeneous Ray Tissue
Homogeneous ray tissue refers to wood rays entirely composed of recumbent cells.
3.10 Heterogeneous Ray Tissue
Heterogeneous ray tissue refers to wood rays entirely or partially composed of square
or upright cells.
4 Classification
Hongmu is classified into 8 types in total. red sandalwood, rosewood, scented
rosewood, black rosewood, violet rosewood, ebony, striped ebony and wenge.
5 Requirements
The main characteristics of red sandalwood, rosewood, scented rosewood, black
rosewood, violet rosewood, ebony, striped ebony and wenge species shall comply with
the stipulations in Appendix A.
6 Test Methods
6.1 Wood Structural Characteristics
6.1.2 Macroscopic characteristics
Observe and record the color, odor, texture, structure, pattern and hardness
characteristics of wood samples.
6.1.3 Microscopic characteristics
Place a wood sample into a container which contains water, ethanol-glycerin or
ethylenediamine. Then, place it into an oven at about 60 °C to soften and exhaust the
air from the sample, till the wood sample sinks to the bottom. After confirming that the
wood sample is softened, then, take it out. T
6.2 Wood Color
Under natural light, conduct visual inspection of wood color.
6.3 Odor
Adopt the method of nasal sniffing for tests.
6.4 Air-dry Density
6.4.1 The test shall be conducted in accordance with the requirements in GB/T 1933.
6.4.2 When the size of wood sample cannot satisfy the stipulations in GB/T 1933, the
sampling size should be not less than 5 mm 5 mm 5 mm. In terms of irregularly
shaped sample, the method of drainage may be adopted to measure the volume.
7 Determination
When the inspection result complies with the requirements of this Standard, the
product may be determined as Hongmu. In addition, determine the category of
Hongmu.
8 Others
In production, operation and trade activities, the Chinese name, Latin name and place
of origin of Hongmu categories shall be indicated.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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