XIONGSHI FOOTWEAR NEVER COMPROMISES ON QUALITY
Our shoe factory’s quality control and testing methods for finished shoes
Introduction: Natural leather is genuine leather and has pores, which are generally difficult to see clearly with the naked eye.
When using your thumb, press the leather surface to see if there are fine skin lines next to your thumb. The following are the quality control and testing methods of finished shoes from shoe factories. I hope they will be helpful to you.
1. The quality of shoe materials includes two parts: the upper and the lining. The authenticity of the leather should be identified.
Natural leather is genuine leather and has pores. Generally, when it is difficult to see clearly with the naked eye, you can press the leather surface with your thumb to see if there are fine leather grains next to your thumb. There are fine lines, fine lines disappear after you let go, and the surface of the leather shoes is plump and elastic, which is better natural leather. Those with larger and deeper wrinkles are natural leather with poor cortex. If there are no fine lines, most of them are not natural leather, including second-layer shaved leather.
Another notable feature of natural leather is the presence of flaws on the leather surface. Generally, natural leather uppers have some minor flaws on the inside of the shoe and other inconspicuous places, such as uneven skin texture, bright spots, lice, etc. The cross-section of natural leather has three layers with different density: the epidermis is very fine and flexible, there is a dense dermis layer in the middle, and below it is a relatively loose fiber layer of the flesh surface, and there is no obvious boundary between the layers.
The lining of leather shoes is a reinforcing material used to prevent extension and deformation and improve the touch of the foot. Shoe lining materials are required to have a delicate touch, breathability, excellent moisture absorption and moisture removal, and non-fading properties. The linings of mid-to-high-end leather shoes are all made of natural leather and cotton. If the upper is made of natural leather, the lining of the shoe is artificial leather, which can only be regarded as a mid-to-low-end shoe. Most consumers ignore the selection and identification of shoe lining materials, which is a mistake
2. Check the upper suture line and upper bottom bonding seam to identify the quality of processing and production to see if there are any broken threads and whether the upper suture line is neat and standardized. In particular, the bonding area between the upper and sole of the adhesive leather shoe should be bonded smoothly without any grooves or ridges, and without any signs of seams or open glue.
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3. Touch the inner cavity of the shoe with your hand to see if there are any unevenness inside the shoe and on the insole.
Any place that can touch your feet should not be uneven, otherwise your feet will blister. There must be an insole inside the shoe, which is designed to keep the inside of the shoe clean, cover the uneven nail holes on the insole, and improve the feel of the foot.
4. Pinch the heel of the shoe upper with your hands to see if it is stiff and elastic. It is required that there should be no traces of grooves in the stiff heel. The elasticity below the ankle should be good and should not be too stiff, otherwise the ankle will be damaged.
5. Press the inner bottom at the waist to see if it is hard
The insole of the shoe is the torso and skeleton of the shoe. It is best to press the insole hard until it does not move at all. If the skeleton and trunk are not stiff, the shoes will inevitably deform and damage the shape of the feet.
6. Place the shoes flatly on the table or glass plate to check whether the shoes are stable. When the shoes are placed on the table, they should immediately stop shaking left and right.
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7. Insert the tip of your middle finger under the front sole to check whether the height of the front heel is appropriate.
When the tip of the shoe tip is just enough to reach the thickness of the middle finger, it means that the front hem of the shoe tip is just right. When the front heel of the toe is too large, the stability is reduced; when the front heel is too small, the sole of the shoe wears out quickly, the shoe is prone to deformation, and the foot is prone to fatigue.
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8. Hold the shoes with your hands to see if the contact between the sole and the heel is smooth.
Place the sole and heel of the shoe against the side of the table (or counter), with the side of the shoe facing up, and check the contact area of the sole. It is better to keep the sole of the shoe (the widest part of the sole) and the entire heel plane in contact with the side of the table.
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9. Place the shoes flat on the table and check whether they are straight from the front and back.
First, from the toe of the shoe to the back, look at the distance between the inner and outer edges of the sole and the height of the table. There should be little difference, so it is better to maintain a consistent balance. Then, from the heel of the shoe to the front, check whether the heel of the shoe is upright and not tilted inward or outward.
10. Use your index finger to stand on the outside of the back of the shallow shoe to check the height of the upper at the outer ankle.
Touch the insole of the shoe with the tip of your index finger pointing downward, and bring your index finger close to the upper of the outer ankle. Check whether the second knuckle line of the index finger is consistent with the height of the upper of the outer ankle. For general daily life shoes, social etiquette shoes, and fashion shoes, it is better to be slightly lower than the second knuckle line of the index finger; the upper opening of the back of low-waist sports shoes and casual shoes has a soft opening structure, and the outer ankle upper can be slightly higher At the line of the second knuckle of the index finger
11. Look down at the shoe upper from top to bottom to check the symmetry of the upper parts and whether the outline of the shoe mouth is deformed.
Take the straight line between the toe and the midpoint of the heel as the axis of symmetry. Check whether the components on the upper are symmetrical. It is better if the inside and outside are symmetrical to each other and do not move forward or backward. The contour line of the shoe mouth should be hugged towards the inside of the shoe. A smooth and rounded shoe is better; a shoe that is twisted into a lotus leaf shape is a poor quality shoe.
12. Understand the performance of the outsole of the shoe and choose a suitable outsole
There are many kinds of outsoles for shoes. According to the main raw materials, they can be divided into rubber soles, imitation leather soles, plastic soles, etc. Their respective properties are: rubber soles are soft, elastic, non-slip, wear-resistant, heat-resistant and cold-resistant. Good features. It's just that the texture is a little heavier. Imitation leather sole, light, stiff, wear-resistant and resistant to twists and turns. But it is less elastic and less slip-resistant.
Plastic soles are wear-resistant and have good elasticity. But the texture is hard and its heat and cold resistance is poor.
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