Difference between revisions of "Leather cutting waste"
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==Leather cutting waste in leather processing== | ==Leather cutting waste in leather processing== | ||
| − | Leather cutting waste is the remaining leather after [[cutting | + | Leather cutting waste is the remaining leather after [[Leather cutting|cutting]] the needed contours. These are either too small or damaged parts. Since natural leather (unlike [[imitation leather]] or [[alcantara]]) has grown irregularly and an animal skin does not have an ideal [[Parts of the hide|geometrical shape]], the leather cutting waste of [[genuine leather]] is generally a lot despite all attempts to optimally divide the existing material. In the case of small articles, the waste is about 20 per cent of the leather surface. |
The [[Measures and weights|larger]] and [[Natural markings on leather|perfect]] the animal skin surface is, the less is the leather cutting waste. | The [[Measures and weights|larger]] and [[Natural markings on leather|perfect]] the animal skin surface is, the less is the leather cutting waste. | ||
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<p align=center> | <p align=center> | ||
| − | ''In industrial [[cutting | + | ''In industrial [[Leather cutting|processing of leather]], large amounts of leather cutting waste is produced.''<br></p> |
<p> </p> | <p> </p> | ||
In the [[leather furniture|furniture]] and [[car leather|vehicle sector]], the waste is generally between 30 and 45%. For furniture sets with large individual surfaces, the waste can be as high as 80%. Since leather is sold according to [[Measures and weights|square meters]], the waste is an important cost factor. Therefore, inexpensive leather objects have more seams and smaller surfaces and high-quality leather covers can consist of generous individual surfaces. | In the [[leather furniture|furniture]] and [[car leather|vehicle sector]], the waste is generally between 30 and 45%. For furniture sets with large individual surfaces, the waste can be as high as 80%. Since leather is sold according to [[Measures and weights|square meters]], the waste is an important cost factor. Therefore, inexpensive leather objects have more seams and smaller surfaces and high-quality leather covers can consist of generous individual surfaces. | ||
| − | Leather cutting waste is not disposed. Leather | + | Leather cutting waste is not disposed. Leather cutting waste is commodity. It can be used as insulation of floors of riding stables or it is sold to China and other emerging countries. There, the leather cutting waste is processed to all kinds of [[leather accessories]]. To a limited extent, leather cutting waste is also sold by specialized retailers to end-users and small [[Leather workshop|leather workshops]]. |
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</p> | </p> | ||
<p align=center> | <p align=center> | ||
| − | ''Nearly every [[ | + | ''Nearly every [[leather cutting]] leads to Leather cutting waste.''<br></p> |
<p> </p> | <p> </p> | ||
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Already in the slaughterhouse the possible yield from an animal skin is influenced. By professional removing of the skin from the dad animal, the leather waste can be reduced. Lobes, cuts, holes and strong indentations reduce the surface yield. | Already in the slaughterhouse the possible yield from an animal skin is influenced. By professional removing of the skin from the dad animal, the leather waste can be reduced. Lobes, cuts, holes and strong indentations reduce the surface yield. | ||
| − | Cutting damages in the middle part of a skin make it impossible to use the skin for large-format leather products such as [[leather furniture|sofas]]. Not only holes, but also notches and cuts make a skin for the leather manufacture | + | Cutting damages in the middle part of a skin make it impossible to use the skin for large-format leather products such as [[leather furniture|sofas]]. Not only holes, but also notches and cuts make a skin useless for the leather manufacture. Either there are holes, or the area is too thin and unstable for good [[leather quality]]. Suitable knives and well trained staff ensure a good leather yield. |
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| − | Damaged skins are also a risk in the [[leather production|leather tannning]] process | + | Damaged skins are also a risk in the [[leather production|leather tannning]] process. Irregular skin flaps quickly get caught in production machines and can damage them in worst case. At least the skin is often ruptured when this happens. |
Even when peeling the skin with the aid of machine, the skin can [[Natural markings on leather|tear]]. | Even when peeling the skin with the aid of machine, the skin can [[Natural markings on leather|tear]]. | ||
Revision as of 19:27, 18 February 2017
Leather cutting waste in leather processing
Leather cutting waste is the remaining leather after cutting the needed contours. These are either too small or damaged parts. Since natural leather (unlike imitation leather or alcantara) has grown irregularly and an animal skin does not have an ideal geometrical shape, the leather cutting waste of genuine leather is generally a lot despite all attempts to optimally divide the existing material. In the case of small articles, the waste is about 20 per cent of the leather surface.
The larger and perfect the animal skin surface is, the less is the leather cutting waste.
In industrial processing of leather, large amounts of leather cutting waste is produced.
In the furniture and vehicle sector, the waste is generally between 30 and 45%. For furniture sets with large individual surfaces, the waste can be as high as 80%. Since leather is sold according to square meters, the waste is an important cost factor. Therefore, inexpensive leather objects have more seams and smaller surfaces and high-quality leather covers can consist of generous individual surfaces.
Leather cutting waste is not disposed. Leather cutting waste is commodity. It can be used as insulation of floors of riding stables or it is sold to China and other emerging countries. There, the leather cutting waste is processed to all kinds of leather accessories. To a limited extent, leather cutting waste is also sold by specialized retailers to end-users and small leather workshops.
Nearly every leather cutting leads to Leather cutting waste.
Leather cutting waste in the slaughterhouse
Already in the slaughterhouse the possible yield from an animal skin is influenced. By professional removing of the skin from the dad animal, the leather waste can be reduced. Lobes, cuts, holes and strong indentations reduce the surface yield.
Cutting damages in the middle part of a skin make it impossible to use the skin for large-format leather products such as sofas. Not only holes, but also notches and cuts make a skin useless for the leather manufacture. Either there are holes, or the area is too thin and unstable for good leather quality. Suitable knives and well trained staff ensure a good leather yield.
Damaged skins are also a risk in the leather tannning process. Irregular skin flaps quickly get caught in production machines and can damage them in worst case. At least the skin is often ruptured when this happens.
Even when peeling the skin with the aid of machine, the skin can tear.
The recomended procedure is to prevent these problems from the start in the skin removing cutting and ensure the quality. An incision over the belly is going straight and central from the anus to the mouth and meets the level of the scrotum / udders.
Image 1:Peeling off the skin in the slaughterhouse.
Image 2:With posters, associations try to teach the butchers the best possible leather saving cutting performance.
Additional information
- Fleshing - Making of leather
- Rawhide
- Natural markings on leather
- Leather defects
- Leather damages
- Leather cutting
- Measures and weights
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