Clothing Inspection | Tie Inspection Requirements and Methods
A tie is a decorative clothing accessory that is usually worn with formal attire such as shirts and suits. It is a long, thin piece of cloth, usually made of silk, cotton, wool or synthetic fibers, that is tied and fastened below the neck. Ties not only play an important role in the workplace and formal occasions, but also can express personal style. How do third-party companies inspect ties? What are the inspection standards for ties? What are the inspection methods for ties?
Tie inspection specifications and size requirements
The allowable deviations of the specifications and dimensions of the main parts of the finished product are as specified in Table 1, and the various parts of the finished product are divided.
Table 1
|
Part Name |
Specification size tolerance |
Remark |
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|
Total length ≥100cm |
Total length <100cm |
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|
full length |
±2.0cm |
±1.0cm |
|
|
Big head length |
±1.0cm |
Fixed knot ties are not tested |
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|
Middle length |
±1.0cm |
Fixed knot ties are not tested |
|
|
Small belt length |
±0.5cm |
Stretch ties are not tested |
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|
Neck strap length |
±1.0cm |
Stretch ties are not tested |
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|
High tie knot |
±0.2cm |
Stretch ties are not tested |
|
|
Large head width |
±0.2cm |
|
|
|
Middle width |
±0.2cm |
Fixed knot ties are not tested |
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|
Small head width |
±0.2cm |
|
|
|
Big and small head angle |
±2° |
|
|
|
Large and small head splicing angle |
±5° |
Fixed knot ties are not tested |
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Trademark location |
±0.5cm |
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Loop position |
±0.5cm |
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|
Requirements for raw materials for tie inspection
Fabric requirements
Fabrics that meet quality requirements should be used.
Lining requirements
The lining should be suitable for the performance and color of the fabric (except for special designs).
Excipients requirements
Lining
The lining cloth used should be suitable for the size change rate and thickness of the fabric used, and its quality should meet the relevant requirements.
Sutures
The sewing thread should be suitable for the quality of the fabric used, and its color should be suitable for the base color of the fabric. The thread used to sew the fabric loops should be suitable for the base color of the fabric loops, and the thread used to sew the trademark should be suitable for the base color of the trademark, except for special designs. The performance of the embroidery thread should be suitable for the performance of the fabric.
Attachment Request
General
The accessories used should have a smooth surface, without burrs, defects, flaws, or accessible sharp points or edges.
Note: Accessible sharp points and sharp edges refer to sharp points and edges on the finished product that may cause harm to human skin under normal wearing conditions.
Knot
The shape is that of a tie knot and should comply with relevant requirements.
Flakes
It is a soft thin sheet, the shape of which matches the shape of the knot and should meet the relevant requirements.
Splicing requirements
The stretch tie fabric splicing allows three pieces and two pieces to be spliced (seam separated), and the length of the spliced end shall not be shorter than 1/2 of the total length.
The finished fabric is spliced at a 45° angle with the yarns in the same direction.
Color difference requirements
The front of the finished product is part 1, and the back is part 2, see Figure 2. The color difference of part 1 is not less than level 4-5, and the color difference of part 2 is not less than level 4.
Appearance defect requirements
The allowable extent of appearance defects in each part of the finished product is as specified in Table 2, and the division of each part is shown in Figure 2. Each part is allowed to have only one defect within the allowable extent.
Table 2
|
Defect name |
The allowed existence degree of each part |
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|
Part 1 |
Part 2 |
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Linear defects |
Not allowed |
Total length 2.0cm or less |
|
Strip defects |
Not allowed |
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|
Color File |
Not allowed |
slight |
|
Defects (oil, rust, color spots) |
Not allowed |
Slight, total area no larger than 0.2cm² |
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Damage defects |
Not allowed |
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Dispersive defects |
Not allowed |
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Note 1: The defect size is measured based on the maximum direction of the defect shape. |
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Sewing and ironing requirements
-The finished product has no thread pulling or snagging.
-The finished product has straight and flat sides without chain shape.
Note: No chain means lifting the small end of the stretch tie to make it naturally vertical, and the tie will not twist.
-The big and small heads are turned over and the stitches are not visible. The width of the seat mouth is the same on both sides. The right angle sides of the big and small heads are symmetrical on both sides, and the length error on both sides is no more than 0.2cm.
-Stitch density: no less than 10 stitches/3cm for flat sewing and no less than 4 stitches/4cm for hand stitching. Except for special designs.
-The overall deviation of the pattern from the specified position shall not exceed 0.2cm.
- The seams at the splicing are smooth, without elasticity, skipped stitches or missed stitches.
-The center seam on the back should be centered, and there should be 15cm or more of hidden thread at the end of the seam.
- The seam allowance of the seams and the back center seam shall not be less than 0.8 cm.
-Embroidery stitches are neat and no marks are missed.
-The finished product is neat and tidy, with no stains or hair on part 1.
-Ironing makes it flat and straight, without any shine, dead folds or water stains.
-The trademark is centered on the left and right, and the trademark and durable label are positioned straight, flat and firmly.
-The fabric loop is straight, not twisted, centered left and right, and not skewed.
- Sharp objects such as metal needles should not be used in the packaging of finished products, and there should be no broken needle residues on the finished products.
Physical and chemical performance requirements
The physical and chemical performance requirements of the finished product are as specified in Table 3. Among them, the safety performance of ties worn by children aged 3 to 14 should also comply with the requirements of GB31701.
Table 3
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project |
Grading requirements |
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Superior products |
First-class products |
Qualified products |
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Fiber content/% |
Comply with GB/T29862 |
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Formaldehyde content/(mg/kg) |
Comply with GB18401 |
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pH |
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Degradable carcinogenic aromatic amine dyes/(mg/kg) |
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Odor |
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Washing size change a/cm |
Total length ≥100cm |
3 |
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Total length <100cm |
1.5 |
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Fabric color fastness/grade ≥ |
Soap-resistant |
Discoloration |
4 |
3-4 |
3-4 |
|
Color staining |
4 |
3-4 |
3 |
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|
Resistant to dry cleaninga |
Discoloration |
4 |
4 |
3-4 |
|
|
Color staining |
4 |
3-4 |
3 |
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Water resistant |
Discoloration |
4 |
3-4 |
3 |
|
|
Color staining |
4 |
3-4 |
3 |
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Sweat resistant |
Discoloration |
4 |
3-4 |
3 |
|
|
Color staining |
4 |
3-4 |
3 |
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Friction resistance |
Dry Friction |
4 |
3-4 |
3 |
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|
Wet friction |
4 |
3-4 |
3 |
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Lightfast |
Dark |
4 |
4 |
3 |
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Light |
4 |
3 |
3 |
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Heat and pressure resistance |
Discoloration |
4 |
3-4 |
3 |
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|
Color staining |
4 |
3-4 |
3 |
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Lining color fastness/grade ≥ |
Water resistant |
Discoloration |
4 |
3-4 |
3 |
|
Color staining |
4 |
3-4 |
3 |
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Sweat resistant |
Discoloration |
4 |
3-4 |
3 |
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|
Color staining |
4 |
3-4 |
3 |
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Dry friction resistance |
4 |
3-4 |
3 |
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Zipper tape color fastness b/grade ≥ |
Soap-resistant |
Discoloration |
4 |
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Color staining |
4 |
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Water resistant |
Discoloration |
3 |
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Color staining |
3 |
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Sweat resistant |
Discoloration |
3 |
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Color staining |
3 |
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Friction resistance |
Dry Friction |
4 |
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Wet friction |
4 |
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Zipper |
Good meshing, smooth and fluent; no defects such as "breaking belly" and opening and closing too tight; the zipper pull can lock the zipper |
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Safety buckle |
No damage; pull-off force ≥15N and ≤25N |
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Appearance after washing |
The finished product is not allowed to be damaged, fall off, obviously twisted, deformed or bubbled after washing (including water washing and dry cleaning), and the color change shall not be less than level 4 |
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Note: According to GB/T4841.3, the color darker than 1/12 of the standard depth of dye is dark, and the color not darker than 1/12 of the standard depth of dye is light. |
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a. Colour fastness to soap washing, dimensional change after washing and appearance after washing are not assessed for products marked as not washable in water; colour fastness to dry cleaning and appearance after dry cleaning are not assessed for products marked as not dry cleanable in water. |
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Tie Inspection Method
Test tools
-Steel measuring tape or ruler with 1mm graduations.
-Protractor.
- Grey scale for assessing discoloration.
-1/12 dye standard depth color chart.
Finished product size determination
The specifications and dimensions of the main parts of the finished product shall be measured as specified in Figure 1 and Table 4.
Table 4
|
Part Name |
Measurement method |
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|
Stretch tie |
Fixed knot tie |
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|
full length |
Lay the tie flat and measure the distance from the big end to the small end. |
Lay the tie flat with the front facing up and measure the distance from the tip of the tie knot to the top. |
|
Big head length |
Lay the tie flat with the front facing up. The distance from the tip of the tie to the center of the first seam diagonal line is |
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|
Middle length |
When the tie is laid flat with the front side facing up, the distance between the center points of the two diagonal seams is |
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Small belt length |
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Lay the tie flat with the back facing up, and measure the vertical distance from the tip of the small head to the zipper seam |
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Neck strap length |
|
Unzip and measure the circumference of the neckband |
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High tie knot |
|
Lay the tie flat with the front side facing up and measure the center distance from the top of the tie knot to the end. |
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Middle width |
Measure the width of the tie where it is folded horizontally |
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Big head stitching corner |
Lay the tie flat with the front facing up, and measure the maximum angle between the bottom edge of the tie and the seam at the end. |
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Small head splicing corner |
Lay the tie flat with the front side facing up, and measure the maximum angle between the bottom edge of the tie and the seam of the small end. |
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Large head width |
Measure the length of the side opposite the big end |
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Small head width |
Measure the length of the side opposite the tip of the small head |
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Big and small head angle |
Measure the maximum angles formed by the two sharp corners of the big and small heads on the tie body. |
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Trademark location |
Lay the tie flat with the back facing up, and measure the vertical distance from the tip of the tie to the bottom of the label. |
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Loop position |
Lay the tie flat with the back facing up, and measure the vertical distance from the tip of the tie to the bottom of the loop. |
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Appearance measurement
- Appearance inspection is generally carried out using lighting with an illumination of no less than 6001x. Northern light can also be used when conditions permit.
-The finished product splicing measurement method shall be in accordance with Figure 1 and Table 4. A steel tape measure or ruler and a protractor shall be used to measure the length of the large end and the splicing angles of the large and small ends respectively.
-When measuring the degree of color difference, the measured part should be in the same direction, the incident light should be at an angle of about 45° to the measured object, the observation direction should be perpendicular to the surface of the measured object, and the distance should be 60cm for visual inspection and compared with the GB/T250 sample card.
- The allowed extent of appearance defects shall be visually inspected at a distance of 60cm and measured with a steel tape measure or ruler when necessary.
-When measuring the needle density, use a steel tape measure or ruler, and measure the needle density of the flat sewing needle at any 3cm on the finished sewing stitch. The needle density of the hand-sewn needle is measured at any 4cm on the finished hand-sewn stitch (except for thin and thick parts).
Appearance quality grades and defect classification rules
Appearance quality grade classification
The quality grade of finished products is based on the presence and severity of defects. The individual products in the sample are graded based on the number of defects and their severity, and the batch grade is based on the number of grades of individual products in the sample.
Appearance defect classification
A single product that does not meet the requirements of this standard constitutes a defect. Defects are divided into three categories according to the degree of non-compliance with the standard and the impact on product performance and appearance:
a) Serious defects: defects that seriously reduce the performance of the product and seriously affect the appearance of the product;
b) Major defects: defects that do not seriously reduce the performance of the product or seriously affect the appearance of the product, but are more serious than those that do not meet the standard requirements;
c) Minor defects: defects that do not meet standard requirements but have little impact on the performance and appearance of the product.
Appearance quality defect judgment basis
The determination of appearance quality defects shall be in accordance with the provisions of Table 5.
Table 5
|
project |
Serial number |
Minor defects |
Heavy defects |
Serious flaws |
|
Instructions |
1 |
Non-standard content |
— |
— |
|
Specification |
2 |
The angles of the large and small heads are not straight, and the angle deviation exceeds the standard by 1°, but not more than 2°; the length direction (L) specification exceeds the standard by 50%; the width direction (W) specification exceeds the standard by 100%. |
The sharp angles of the big and small heads are skewed, and the angle deviation exceeds the standard by 2°, but not more than 4°; the length direction (L) specification exceeds the standard by more than 50% and within 100%; the width direction (W) specification exceeds the standard by 100% or more |
The sharp angles of the large and small heads are seriously skewed, and the angle deviation exceeds the 4° specified in this standard; the length direction (L) specification exceeds the specified index of this standard by 100% or more |
|
raw materials |
3 |
The color of the lining of the big and small heads is not suitable for the fabric; the accessories have quality problems, but it does not affect the use |
The lining is stiff and does not match the fabric; the accessories have quality problems, affecting the use |
The attachment has quality problems and cannot be used |
|
Splicing |
4 |
The splicing angle exceeds the standard by more than 5° and is within 10° |
The splicing angle exceeds the standard by more than 10°, but is within 15°. |
The splicing angle exceeds the standard by more than 15°; the length of the spliced end is shorter than 1/2 of the total length |
|
Chromatic Aberration |
5 |
The color difference of the surface is less than half a grade specified in this standard. |
The color difference of the surface is lower than the standard by more than half a grade |
— |
|
Defects |
6 |
Part 2 exceeds the requirements of this standard |
Part 1 exceeds the requirements of this standard |
— |
|
Sewing and Ironing |
7 |
— |
There are wire drawing and hooking on the surface of part 2 |
There are wire drawing and hooking on the surface of part 1 |
|
8 |
The edges are asymmetrical or not straight |
The sideline is seriously asymmetrical; the sideline is obviously not straight |
The whole tie is chain-shaped |
|
|
9 |
The right angles of the large and small heads are asymmetrical, and the length error of the two right angles is greater than 0.2cm; the width of the seat mouth is inconsistent, and the stitches are exposed |
The right angles of the large and small heads are seriously asymmetrical, and the length error of the two right angles is greater than 0.4cm; the stop mouth is inverted, and the stitches are seriously exposed |
— |
|
|
10 |
The number of flat sewing needles is less than 2 needles specified in this standard |
The number of flat sewing needles is 2 or more less than the standard; the number of hand-sewing needles is 1 less than the standard |
The number of handmade needles is lower than that specified in this standard by more than 1 needle |
|
|
11 |
The position of the marking pattern deviates from the specified position by more than 0.2cm and within 0.5cm as specified in this standard. |
The pattern is obviously lacking in color; the direction is obviously inconsistent; the position of the marking pattern deviates from the specified position by more than 0.5 cm as specified in this standard |
— |
|
|
12 |
The seams at the joints are slightly uneven and elastic |
The seams at the joints are obviously uneven and there is obvious tightness |
There are skipped or missed stitches at the seams |
|
|
13 |
The back center seam is not centered |
The back center seam is obviously not centered, and the end of the center seam is less than 15cm |
— |
|
|
14 |
The back middle seam is bent and not straight |
The back center seam is obviously bent and not straight; the stitches are exposed; the seam allowance is less than 0.2cm as specified in this standard |
The back center seam is broken; the fabric is torn; the seam allowance is more than 0.2cm lower than the standard |
|
|
15 |
Embroidery stitches are uneven; slight missing marks |
Severe missed print |
— |
|
|
16 |
There is a slight stain larger than 0.2cm² on the surface of part 2 |
There are slight stains on the surface of part 1 and obvious stains on the surface of part 2 |
There are obvious stains on the surface of part 1 |
|
|
17 |
Ironing is not flat; there is aurora |
Slight yellowing and discoloration |
Deterioration; broken |
|
|
18 |
The trademark is not sewn properly and is obviously skewed |
— |
— |
|
|
19 |
The loops are crooked, twisted, or uneven. |
— |
— |
|
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|
The horizontal pattern deviates from the horizontal line by more than 0.3cm and not more than 0.5cm; |
The horizontal pattern deviates from the horizontal line by more than 0.5cm and not more than 1.0cm; |
The horizontal pattern deviates from the horizontal line by more than 1.0 cm; the oblique pattern is parallel to the right angle side of the large end, and the deviation is more than 1 cm; the vertical pattern No. 1 deviates from the center line by more than 1.0 cm |
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|
20 |
The pattern is parallel to the right angle side of the big end, with a deviation of more than 0.3cm and less than 0.5cm; the vertical pattern No. 1 part deviates from the center line by no more than 0.5cm |
The pattern is parallel to the right angle side of the big end, with a deviation of more than 0.5cm and less than 1.0cm; the vertical pattern No. 1 part deviates from the center line by no more than 1.0cm |
— |
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twenty one |
Fixed knot tie The knot is slightly loose, asymmetrical, and the thread ends are exposed |
The fixed tie is seriously loose, asymmetrical, with loose or missing knots. The knot in the tie does not meet the requirements. |
— |
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|
twenty two |
Fixed knot tie zipper exposed base fabric width uneven |
The zipper puller of the fixed knot tie fell off |
— |
|
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twenty three |
— |
— |
There are sharp objects such as metal needles in the finished product packaging, and there are broken needle residues on the finished product |
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Note 1: The above defects are calculated cumulatively item by item according to serial number. |
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Decision rules
Single strip (sample) appearance judgment
Superior products: severe defects = 0, serious defects = 0, minor defects ≤ 2
First-class products: serious defects = 0, major defects = 0, minor defects ≤ 4
Qualified products: Number of serious defects = 0 Number of major defects = 0 Number of minor defects ≤ 6 or
Number of severe defects = 0 Number of serious defects ≤ 1 Number of minor defects ≤ 3
Batch grade determination
Superior product batch: The number of superior products in the appearance inspection samples is ≥90%, and there are no unqualified products. All physical and chemical performance index tests meet the requirements of superior products (at least 2 or more test results of appearance, zipper and safety buckle after washing are qualified).
First-class product batch: The number of first-class products and above in the appearance inspection samples is ≥90%, and there are no unqualified products. All physical and chemical performance index tests meet the first-class product requirements (at least 2 or more appearance, zipper, and safety buckle inspection results after washing are qualified).
Qualified product batch: The number of qualified products and above in the appearance inspection samples is ≥90%, and it does not include unqualified products with serious defects. All physical and chemical performance index tests meet the qualified product requirements (at least 2 or more of the appearance, zipper and safety buckle inspection results after washing are qualified).
When the appearance quality judgment is inconsistent with the physical and chemical performance judgment, a low-level judgment is performed.
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Clothing Inspection | Tie Inspection Requirements and Methods
A tie is a decorative clothing accessory that is usually worn with formal attire such as shirts and suits. It is a long, thin piece of cloth, usually made of silk, cotton, wool or synthetic fibers, tied at the base of the neck. Ties not only play an important role in the workplace and formal occasions, but can also express personal style.
