Nuba leather English name nubuck, also known as grinding noodle cow or Niu Ba Ge. Niu Ba leather is a wet PU. The PU slurry forms upright cells during the curing process and has a fluffy touch after surface grinding. Because of its upright cells, it is called "Nurba" - NUBUCK; it is also called "sand-skin" because it needs to be ground. Because of its unique touch, it is also called "faux suede". . Niu Ba Ge touch has a suede feel, the skin is thick and soft, the surface color, fluff, skin texture naturally, not pay attention to symmetry and consistency, mainly used in casual shoes fabric. Keep away from corrosive and oily objects, use a sponge to gently pat the dust, mud, etc., and then wipe the blot with a semi-dry towel. The same color matte care agent is artificial sanding, which looks a bit like anti Leather, but relatively flat
If you are interested, you can read some knowledge about leather: First, the classification of leather: mainly divided into natural leather and substitute leather.
Second, the general characteristics of leather:
(1) Natural leather: cowhide, sheepskin, pigskin, miscellaneous skin, shaving leather, etc.
1, cowhide
(1) Yellow cowhide: The pores are small and shallow, distributed in a circular shape, uniform and tight, and the pores are straight and extend to the inside. The hand feels full, smooth, bright, soft, fine, solid and elastic. (can be divided into six layers)
(2) Buffalo: The hair is thin, the hair root is thick and deep, the skin is thick, the leather surface is rough, and the texture is poor. Generally used for soles.
2, sheepskin
(1) Goatskin: The surface of the leather is semi-circular, with 2 to 4 pinholes arranged on the arc, surrounded by a large number of fine villi pores, and the pores are arranged in a fish scale, and the hand is rich in extensibility;
(2) Sheepskin: The leather surface is smooth and smooth, the skin is thin, the pores are small, and the shape is flat and round. It consists of several pores, which are arranged in rows and rows. The color is uniform and uniform, and the leather is full, soft and stretchable. Clean, no greasy, but low strength.
3, pig skin: rough leather, there are obvious pores, triangular arrangement, poor elasticity, poor aesthetic effect, durable, strong.
4, miscellaneous skin (horse skin, suede, etc.): slightly similar to cowhide, the pores are oval, the pores are shallow, not obvious, the grain surface is finer than the cowhide, but slightly larger than the leather pores, obliquely into the leather, showing the mountains The shape is regularly arranged, the leather surface is soft and loose, the color is dim, and the brightness is not as good as cowhide.
5, shaving leather: leather, horse skin, suede and other leather modified, no original features, but the color is uniform, beautiful, soft, but the pores have cracks.
(2) Substitute leather:
1. Recycled leather: It is made by crushing the scraps and scraps of leather into fibrous, adding plant fiber binder and various compounding agents, and pressing and molding. It is mostly used for sneakers and belts. Since the raw materials for the production of recycled leather are mainly natural leather waste, the recycled leather has certain moisture absorption, water permeability and gas permeability, and also has certain heat resistance, wear resistance and elasticity, but the strength is small and the tearing property is poor.
2, artificial leather: synthetic resin based on textile or knitted materials, is a leather-like product, the coating material is mainly PVC resin, the gloss is bright, the color is bright and diverse, and the surface has no traces of scratches. The imitation sheepskin looks like sheepskin and looks fine without pores.
3. Synthetic leather: It is made of non-woven fabric as the base and is coated with new resin material. It is very hygroscopic and breathable. The coating is a new type of polyurethane. It has good hand feeling, wear resistance, bending resistance and strength better than artificial leather.
4, PU leather: (Gao leather) appearance coating is strong, can be pressed out of a variety of patterns, bright and beautiful, but poor hygroscopicity, poor temperature, poor tearing, easy to expand when incision, but uniform quality And the surface is not disfigured, not mildew, and has certain resistance to water and solvent.
Third, the quality standards of various leather products should meet
Adhesive shoes: QB/T1002-97 leather sandals: QB/T2307-97
Leather clothing: QB/T1615-97 back bag: QB/T1333-97
Briefcase: QB/T2277-96 leather tape: QB/T1618-92
Leather ticket holder: QB/T1619-92 leather gloves: QB/T1584-92
Travel shoes: QB/T1507-94
Fourth, the leather logo
1. Concept: refers to the trademark registered by the China Leather Industry Association in the State Administration for Industry and Commerce, which is a special mark for natural leather products.
2, meaning
(1) The product is made of natural leather.
(2) The products are high-quality medium and high-grade products. In addition to complying with relevant industry standards and national standards, the products must also comply with the relevant provisions of the leather logo technical manual.
(3) The production enterprise has a good after-sales service system.
If you don't use leather products, you can't wear the leather logo. If you want to wear the leather logo, you need to go through the strict examination of the China Leather Industry Association. After approval, you can hang it.
3. Pattern: The registered trademark of the leather logo is an artistic deformation pattern consisting of a whole sheep, a pair of horns and a skin shape. The overall pattern is a circular drum. The center of the pattern has three letters of GLP. It is the abbreviation of the leather product. The color of the main body of the pattern is black on white, and only three letters are red. The meaning of the pattern: cattle, sheep and pigs are the three main natural leather materials of leather products. The pattern is a circular drum. On the one hand, it symbolizes the main processing equipment of the tanning industry. On the other hand, it symbolizes the leather industry rolling forward. development of.
4, leather signage: leather signage is the only logo of the leather logo products, leather goods tagged with leather signs, indicating that this product is a leather logo product. Consumers can only enjoy the after-sales service of distributors, manufacturers and China Leather Industry Association if they purchase leather products with leather logos.
5, leather logo signs specifications:
Type A is 3.5CM×5CM, which is generally used for leather shoes and small leather goods.
Type B is 7CM×5CM, which is generally used for leather garments and large leather goods.
Book-type leather signage: the cover is printed with the logo of the leather logo, the cover and the back cover have blue anti-counterfeiting shading, and the second and the third respectively introduce the anti-counterfeiting technology of the leather logo. How can consumers protect their legitimate rights and leather with the leather logo? Sign management office phone.
6. For the purpose of anti-counterfeiting, the leather signage has adopted the following anti-counterfeiting measures in printing: at the same time, it is printed by two anti-counterfeiting technologies: fluorescent and laser; the signs are printed by two factories and then composited into genuine products; there are six on the front and back of the sign. Secrecy measures. The easiest way to identify this is to use a UV lamp (ticket identifier) to illuminate the front of the sign and the words "leather" and "H Q" will appear. The number below the reverse side of the sign changes from light red to yellow under ultraviolet light. The other four security measures are not announced, and will be used as the basis for authentication.
5. Suede: The animal skin is called "裘" after being processed, and is collectively called "skin".
Sixth, leather shoes:
(1) Quality standards for leather shoes: General leather shoes should be beautiful in appearance, durable and comfortable to wear, and meet the requirements of light, soft, bright and clean.
The specific requirements for the quality of leather shoes should be considered from three aspects: leather quality, shoe structure and sewing standard. The general requirements for the quality of leather shoes are: the leather of the front (head piece) should be better than the back (crabs), and there should be no obvious scars; the outer wing should be better than the inner wing; the heel must have a goose-shaped bend. The potential, with the help of high and low, not card pain and bones; the upper, shoes keep clean, no knife flowers, greasy, stains and quality damage, the bottom of the shoe is flat, no exposed nail tips.
(2) Inspection of leather shoes: When the retail unit sells leather shoes at the time of acceptance and sales, the various parts of the leather shoes should be carefully examined. The test method is as follows:
1. Comparison of single and double shoes compared to the inspection method requires that the symmetry of each part is good, and there should be no phenomenon such as height, length, width, and unevenness. The thickness and thickness of the front and back of the same pair of shoes should be basically the same, the color is uniform; the surface is not cracked, the bottom is not exposed, and the main part is not loose.
2, the front should be fine and smooth, the leather is soft and fold-resistant, and has a certain thickness; obvious parts should not have defects such as disability, sputum, ribs, and coarse spots; the height of the toe, the length of the baotou, the size of the crab shell, The depth of the mouth should be the same.
3, the back of the two wings are flat and not skewed; the thickness and brightness of the leather surface should be compatible with the front gang; the back sill is allowed to have smear, and the heel should be straight and consistent.
4, the leather of suede shoes should be thick, tough, soft and elastic, the color of the fluff is consistent, the front and back help the thickness and proportion, no spots, mildew, scars, exposed bottom and other rickets.
5, along the strip should be strong and folding, uniform width, uniform thickness, and the stitching of the foot is tight, no fangs dew; the joints along the strip and the slats should be slanted, the connection should be close and flat, pull along the line Tight; uniform from the side, can not pass in and out, the needle code is appropriate; the bottom stitch code is not too dense, should be slightly thinner than the skin.
6. The base of the main root head (lower half of the head) should be hard and flattened with fingers without softening; the upper edge must be flat and soft and elastic, without the disadvantages of hard feet.
7. The plane of the outsole should be neat and smooth, without cracks and obvious scars; the forefoot cortex should be tough, fold-resistant and wear-resistant; the length, width, thickness and color of the same pair of soles should be uniform; the bottom type is flat and not cracked. The palm should not be too convex or empty; the bottom edge is smooth, and the strip is tight and seamless; the stitch code of the seam should be neat and uniform, the seam of the bottom of the skin should be flat; the metal bottom should not contain metal sawdust or yarn. First-class impurities, no bubbles, no shortage of flowers; the bottom of the tire does not split the fins, no cracks, rubber does not delamination.
8. The bottom skin should be smooth and tidy, not transparent, not raised, and the nails are flat. The pad and the skin should be flattened, the clip should be flat, no obvious scars and wrinkles, and the back and the hem should be neat, do not push too far or spit.
9. The height, size, length and length of the bottom heel are relatively uniform; the device is solid, seamless and uneven, with a flat shape and a neat nail; the skin should be smooth and wear-resistant; the triangle iron is flat and the left and right are opposite.
10, the heel, the button is opposite to the left and right, the distance is equal, no paint, rust, the cap does not bloom, the device is firm and not off; the same double color is the same size, the strip is strong. The mouth is not angled, not empty.
11, the surface of the iron car line is even and tidy, does not bend, does not turn the bottom line, does not take the needle, jumper, leak line, the wire head does not leak; the thickness of the rolling mouth is uniform, the mouth is not angled, not empty shell.
12, the help sample conforms to the 楦 type, the outline is clear, the part end is not skewed to either side, the tongs are solid, the hammer is smooth; the shackles are not wrinkled, and the hand touches no convexity.
In addition, in addition to the above-mentioned quality requirements for molding shoes, such as molding, adhesive tape, injection molding, and injection molding, it is also required to achieve a flat bottom without a rubber edge, a clear and beautiful pattern, and a three-dimensional effect. The surface material is not damaged by high temperature, no breakage, open glue and so on.
Finally check the size and grade of the cover is clear and accurate. Two shoes should match, don't follow the foot, the difference. The package carton should be dry.
(3) Cleaning and maintenance of leather shoes
1. Maintenance before wearing
(1) Generally, leather shoes such as cows and sheepskins, before they are worn, first apply a thin layer of shoe polish to form a protective film on the surface of the shoe;
(2) Suede material that is easy to be dusty. If it is not worn, it should be sprayed with a layer of anti-slip agent on the upper of the shoe. After drying, brush it gently with a brush. The maintenance will be simpler.
2, wearing maintenance
Shoes that pass through should be cleaned in time, otherwise dust and dirt will accumulate on the upper, which will shorten the service life of the shoes and double the time to wear them.
(1) General leather, sheepskin shoes
1 Clean the upper: First wipe the dust on the surface of the shoe with a shoe-washing cloth. If there is a large amount of dirt or dirt, use a brush first, then wipe the upper with a cloth dampened with water.
2 Shoe polish: After the upper of the shoe to be cleaned is naturally dry, use a soft cloth or a small brush to apply a small amount of shoe polish evenly on the upper (no force can be used to damage the upper).
3 to play the brightness: rub the shoe polish, after a few minutes, the shoe polish gradually penetrates into the leather, use the old stockings or rags to rub back and forth on the upper, to keep the upper smooth.
(2) shoes with glossy, mirror, PU, PVC material
1 Wipe with a soft cloth with a slight moisture;
2 do not need to use shoe milk or shoe polish.
(3) Cashmere shoes such as cashmere, cowhide, and cowbucks
1 suede shoes with a fine brush first brush in the direction of the hair, and then brush in the opposite direction, can also be gently wiped with a soft eraser to remove dust or dirt;
2 Too dirty dust or dirt can be removed with a scrub rubber, but the force should be appropriate, not too hard, otherwise it will hurt the leather. The gray matte rubber has better effect than white, in order to keep the shoes beautiful, regular water spray and Brushing is very important;
3 shoes faded can use colored cashmere coloring spray, spray evenly at a distance of 20 cm from the shoes to maintain the elasticity and water permeability of the leather.
4 crocodile skin, snake skin, pearl light series material only need to be gently rubbed with a slightly watery cloth.
3, long-term maintenance when not on hold
Before the shoes are collected, the shoes should be cleaned with detergent and shoe polish, and then stored after being dried. When the shoes are not worn, they should be placed in a cool and ventilated place to prevent the ambient temperature from being too high, resulting in discoloration or cracking of the leather surface.
(1) The shoe is fixed with a shoe support (or shoe type holder).
(2) It is best to put a desiccant in the shoe box, and then collect it in a place with less moisture.
(3) When the riding boots are collected for a long time, they should be taken out occasionally to avoid mold.
4, the maintenance method after the shoes become wet
(1) First wipe off the sludge and sewage on the shoes with a damp cloth, then dry with a dry cloth, and apply the varnish when the shoes are semi-dry;
(2) Insert the old newspaper into the shoes (the old newspaper has good water absorption, which can absorb moisture and help to fix the shoe type), then place the shoes on the old newspaper and dry it. Place the place in a cool and ventilated place;
(3) If the leather has become hard, use a cloth dipped in a little sesame oil, olive oil or castor seed oil and gently wipe it with a massage, then apply a thin layer of shoe polish;
(4) Wet shoes can also be blown dry with the cold air of the hair dryer. Do not use hot air. Do not place the shoes in the near-heating or stove. Do not let the sun shine directly. Otherwise, the leather will dry too quickly and deform and harden. Or cracks, etc.;
(5) If the sole is a skin sole, the sole should be facing upwards when dry, so that it can be dried. Wet shoes should not be placed directly into the shoe cabinet to avoid other molds from breeding molds;
(6) The cloth upper is easy to delaminate, should avoid water immersion and strong brushing, especially elastic cloth with stretchability, and excessive brushing will cause slack.
5, matters needing attention
(1) Try to avoid wearing the same pair of shoes for many days, so that the shoes have enough time to restore the original condition;
(2) Prevent the leather from being damp, bumped, exposed to the sun and in contact with corrosive objects;
(3) It is ideal to load the shoe when not wearing, and it can prevent wrinkles and prevent deformation;