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GB/T 3903.5-2011 English PDF (GBT3903.5-2011)

GB/T 3903.5-2011 English PDF (GBT3903.5-2011)

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GB/T 3903.5-2011: Footwear -- General test methods -- Appearance quality
GB/T 3903.5-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 61.060
Y 78
Replacing GB/T 3903.5-1995
Footwear - General test methods - Appearance quality
ISSUED ON. OCTOBER 31, 2011
IMPLEMENTED ON. FEBRUARY 1, 2012
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Test conditions ... 4
5 Test gauges and equipment ... 4
6 Test methods ... 5
Foreword
This Part of GB/T 3903 is drafted according to the rules given in GB/T 1.1-2009.
This Part replaces GB/T 3903.5-1995 General test method for footwear - Test
method of appearance.
Compared with GB/T 3903.5-1995, the major changes of this Part are as follows.
— MODIFY the standard name into “Footwear - General test methods -
Appearance quality”;
— ADD the items “stability, chromatic aberration, Chinese footwear sizing,
quarter curve length and dimensional deviation of the same part” (SEE
serial numbers 2, 3, 4, 9 and 18 in Table 1);
— ADD the requirements for counters, toe caps and uppers (SEE serial
numbers 8, 15, 16, 19, 20 and 21 in Table 1);
— ADD the test for the uneven sole thickness (SEE serial number 14 in
Table 1).
Some of the elements of this document may be the subject of patent rights. The
issuing authorities of this document shall not be held responsible for identifying
any or all such patent rights
This Part was proposed by the China National Light Industry Council.
This Part shall be under the jurisdiction of the National Technical Committee for
Standardization of Shoemaking (SAC/TC 305).
Drafting organizations of this Part. Jiangsu Senda Footwear Industry Co., Ltd,
Hagdon Footwear Industry Co., Ltd, Deerway Co., Ltd, Guangzhou Top Score
Fashion Shoes Co., Ltd, and China Leather and Footwear Industry Research
Institute.
Main drafters of this Part. Dong Weimin, Zhao Zhonghua, Ding Minglu, Liang
Yaohua, Zhang Weijuan and Qin Xiaobo.
The previous released edition replaced by this Part is as follows.
— GB/T 3903.5-1995.
Footwear - General test methods - Appearance quality
1 Scope
This Part of GB/T 3903 specifies the test methods for the appearance quality of
completed footwear (boots) for general wearing.
This Part is applicable to the completed footwear (boots) for general wearing.
2 Normative references
The following documents are essential to the application of this document. For
dated references, only the editions with the dates indicated are applicable to
this document. For undated references, only the latest editions (including all the
amendments) are applicable to this document.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing
change in colour
GB/T 2703 Footwear - Vocabulary
GB/T 3293 Chinese last systems
3 Terms and definitions
The terms and definitions defined in GB/T 2703 are applicable to this document.
4 Test conditions
The test for the footwear’s appearance quality shall be conducted in a well-lit
environment.
5 Test gauges and equipment
5.1 Measuring tape for footwear, with the division value of 1.0mm.
5.2 Vernier caliper, with the division value of 0.02mm.
5.3 Steel ruler, with the division value of 1.0mm.
5.4 Height vernier caliper, with the division value of 0.02mm.
Back seam
deflection
PLACE shoes upright on a horizontal plane. ALIGN the wide seating square’s vertical
edge to the lower point of the back seam. USE a steel ruler to measure the maximum
distance BETWEEN the upper point of the upper’s back seam AND the vertical edge of
the square (SEE Figure 4).
Quarter
deflection
PLACE shoes upright on a horizontal plane. ALIGN the wide seating square’s vertical
edge to the outsole’s back point. USE a steel ruler to measure the maximum distance
BETWEEN the back point of the quarter’s top line AND the vertical edge of the square.
12 Outsole length
USE a (tightened) measuring tape for footwear to measure the length BETWEEN
outsole’s front point AND outsole’s (top piece’s) back point (SEE Figure 5).
13 Outsole width
CONTACT the inside of the outsole with the horizontal plane. STAND sideways in a
vertical direction. USE a height vernier caliper to measure the maximum vertical distance
BETWEEN the outside of the outsole AND the horizontal plane (SEE Figure 6).
Outsole
thickness
For the outsole with even thickness, generally USE a steel ruler to measure the
thicknesses of relevant parts. CUT the sole open along the outsole axis if necessary.
USE a steel ruler to measure the thicknesses of relevant parts of the outsole at the
incision, such as special-shaped or arc-shaped upper sole. When the dimensions cannot
be measured by using a ruler, it is allowed to use a vernier caliper instead (SEE Figure
7).
Top piece
dimensions
USE a vernier caliper to measure corresponding dimensions.
Heel breast
height
USE a vernier caliper or steel ruler to measure the height of the front heel’s horizontal
vertical plane (the height to the outsole).
17 Heel height
Assembled heels. PLACE shoes upright on a horizontal plane. USE a height vernier
caliper to measure the vertical height OF the upper point on the centerline at the back of
the heel TO the top piece (horizontal plane) (SEE Figure 2).
Other heels. USE a height vernier caliper to measure the vertical height OF the heel’s
back point TO the ground during general wearing of this pair of shoes. CUT the back of
this pair of shoes open along the heel centerline if necessary. USE a height vernier
caliper to measure the height.
Dimensional
deviation of the
same part
FLATTEN a measuring tape for footwear against the shoes (boots). MEASURE from
some reference point to some inspection point. TEST the differences of the same pair of
shoes (boots).
Loose grain of
uppers
BEND the leather surface (grain) inward for about 90°. If small and continuous wrinkles
appear (or no wrinkles appear), and disappear after laying the surface (grain) flat, it
indicates non-loose grain. If larger wrinkles appear on the surface, and do not disappear
after laying the surface flat, it indicates loose grain.
Crazing and
crack grain of
uppers
HOLD one shoe with one hand. DIVE the index and middle fingers of the other hand into
the shoe. Tightly TOP the inside of the upper. PERFORM visual observation to test upper
changes. If cracks appear on the coating, it indicates crazing. If cracks appear on the
leather layer, it indicates crack grain.
21 Toe cap
PERFORM visual observation to test whether the toe caps are upright and flat, and
whether the toe caps of the same pair of shoes are symmetric. USE thumb to press the

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