Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle, sheep, goats, equine animals, buffalo, pigs and hogs, and aquatic animals such as seals and alligators.
Parchment is a writing material made from specially prepared untanned skins of animals—primarily sheep, calves, and goats. It has been used as a writing medium for over two millennia. Vellum is a finer quality parchment made from the skins of young animals such as lambs and young calves.
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation.
A hide or skin is an animal skin treated for human use. The word "hide" is related to the German word Haut, which means skin. The industry defines hides as "skins" of large animals e.g. cow, buffalo; while skins refer to "skins" of smaller animals: goat, sheep, deer, pig, fish, alligator, snake, etc. Common commercial hides include leather from cattle and other livestock animals, buckskin, alligator skin and snake skin. All are used for shoes, clothes, leather bags, belts, or other fashion accessories. Leather is also used in cars, upholstery, interior decorating, horse tack and harnesses. Skins are sometimes still gathered from hunting and processed at a domestic or artisanal level but most leather making is now industrialized and large-scale. Various tannins are used for this purpose. Hides are also used as processed chews for dogs or other pets.
A bullwhip is a single-tailed whip, usually made of braided leather or nylon, designed as a tool for working with livestock or competition.
Fibrils are structural biological materials found in nearly all living organisms. Not to be confused with fibers or filaments, fibrils tend to have diameters ranging from 10–100 nanometers. Fibrils are not usually found alone but rather are parts of greater hierarchical structures commonly found in biological systems. Due to the prevalence of fibrils in biological systems, their study is of great importance in the fields of microbiology, biomechanics, and materials science.
Natural fibers or natural fibres are fibers that are produced by geological processes, or from the bodies of plants or animals. They can be used as a component of composite materials, where the orientation of fibers impacts the properties. Natural fibers can also be matted into sheets to make paper or felt.
The nuchal ligament is a ligament at the back of the neck that is continuous with the supraspinous ligament.
Cowhide is the natural, unbleached skin and hair of a cow. It retains the original coloring of the animal. Cowhides are a product of the food industry from cattle. Cowhide is frequently processed into leather.
A stockwhip is a type of whip made of a long, tapered length of flexible, plaited leather or nylon with a stiff handle and thong able to pivot along the handle easily. Stock whips are used when mustering cattle.
Liming is a process used for parchment or leather processing, in which hides are soaked in an alkali solution. It is performed using a drum and paddle or a pit. Its objectives are:
Vulcanized fibre or red fibre is a laminated plastic composed of only cellulose. The material is a tough, resilient, hornlike material that is lighter than aluminium, tougher than leather, and stiffer than most thermoplastics. The newer wood-laminating grade of vulcanized fibre is used to strengthen wood laminations used in skis, skateboards, support beams and as a sub-laminate under thin wood veneers.
The kangaroo industry in Australia is based on the regulated harvesting of the large, abundant species of kangaroos. Limitation of the numbers of kangaroo can have environmental benefits, and is a way of meat production that does not involve intensive animal farming.
Artificial skin is a collagen scaffold that induces regeneration of skin in mammals such as humans. The term was used in the late 1970s and early 1980s to describe a new treatment for massive burns. It was later discovered that treatment of deep skin wounds in adult animals and humans with this scaffold induces regeneration of the dermis. It has been developed commercially under the name Integra and is used in massively burned patients, during plastic surgery of the skin, and in treatment of chronic skin wounds.
Histology is the study of the minute structure, composition, and function of tissues. Mature human vocal cords are composed of layered structures which are quite different at the histological level.
Role of skin in locomotion describes how the integumentary system is involved in locomotion. Typically the integumentary system can be thought of as skin, however the integumentary system also includes the segmented exoskeleton in arthropods and feathers of birds. The primary role of the integumentary system is to provide protection for the body. However, the structure of the skin has evolved to aid animals in their different modes of locomotion. Soft bodied animals such as starfish rely on the arrangement of the fibers in their tube feet for movement. Eels, snakes, and fish use their skin like an external tendon to generate the propulsive forces need for undulatory locomotion. Vertebrates that fly, glide, and parachute also have a characteristic fiber arrangements of their flight membranes that allows for the skin to maintain its structural integrity during the stress and strain experienced during flight.
A key component in lateral force transmission in skeletal muscle is the extracellular matrix (ECM). Skeletal muscle is a complex biological material that is composed of muscle fibers and an ECM consisting of the epimysium, perimysium, and endomysium. It can be described as a collagen fiber-reinforced composite. The ECM has at least three functions: (1) to provide a framework binding muscle fibers together and ensure their proper alignment, (2) to transmit the forces, either from active muscle contraction or ones passively imposed on it, and (3) providing lubricated surfaces between muscle fibers and bundles enabling the muscle to change shape. The mechanical properties of skeletal muscle depend on both the properties of muscle fibers and the ECM, and the interaction between the two. Contractile forces are transmitted laterally within intramuscular connective tissue to the epimysium and then to the tendon. Due to the nature of skeletal muscle, direct measurements are not possible, but many indirect studies and analyses have shown that the ECM is an important part of force transmission during muscle contraction.
A sustainable wildlife enterprise is a farming system that incorporates sustainable use of wildlife to promote conservation. In Australia, landholders work together across boundaries to sustainably harvest or make use of (ecotourism) naturally occurring wildlife populations such as the kangaroo. Important to the concept is that biodiversity and environmental benefit occurs via alternative land uses. Attaching a value to native resources through commercial development has the potential to provide alternative sources of income, especially in areas where traditional systems are no longer as profitable or environmentally sustainable. The Sustainable Wildlife Enterprise system enables farmers to realise the financial value of native wildlife such as the kangaroo and encourages them to manage their land that supports the source of the income without lowering total farm profitability – hence contributing to habitat and biodiversity conservation. The Sustainable Wildlife Enterprise system has been developed in Australia but is based on world-wide experiences.
Crocodile skin either refers to the skin of a live crocodile or a leather made from dead crocodile hide. It has multiple applications across the fashion industry such as use for bags, shoes, and upholstery after being farmed and treated in specialist farms and tanneries.
Bating, a technical term used in the tanning industry to denote leather that has been treated with hen or pigeon manure, similar to puering where the leather has been treated with dog excrement, and which treatment, in both cases, was performed on the raw hide prior to tanning in order to render the skins, and the subsequent leather, soft and supple. Today, both practices are obsolete and have been replaced in the tanneries with other natural proteolytic enzymes.
