Sheepskin is the hide of a sheep, sometimes also called lambswool. It is used to produce sheepskin leather products and soft, wool-lined clothing or coverings, including gloves and hats and pelts (sheepskin rugs). In particular, lambswool is the principal material used in the ugg boots, footwear traditionally produced in Australia and New Zealand. Binomial name Ovis aries Linnaeus, 1758 The domestic sheep (Ovis aries), the most common species of the sheep genus (Ovis), is a woolly ruminant quadruped which probably descends from the wild mouflon of south-central and south-west Asia. ... Short length Ugg boots. ...
The quality of the skin used in each application depends on several factors, mostly whether the pelt, which is the back of the hide, will be visible or not. Where the pelt is visible, better quality hide with minimal seed will be used.
Seed contamination refers to patches of scar tissue resulting from a healed seed burrow wound during the animal's life. This scar tissue can fall out leaving small holes after the pelt is processed or it can remain in place leaving imperfections in the pelt which cannot be corrected.
In general wool affected by skin diseases are not useable. Other problems include lice infestation, dead wool and regrowth.
Skins are classed, packed and sold in standardised wool lengths:
Bares (newly shorn)
1/8" - 1/4" (03 mm - 07 mm)
1/4" - 1/2" (07 mm - 13 mm)
1/2" - 1" (13 mm - 26 mm)
1" - 2" (26 mm 55 mm)
2" - 4" (55 mm - 110 mm) Full wools
In general longer wool is more prone to weakness in the fibre.
Vellum was originally a translucent or opaque material produced from calfskin that had been soaked, limed, and unhaired, and then dried at normal temperature under tension, usually on a wooden device called a stretching frame.
Today, however, vellum is generally defined as a material made from calfskin, sheepskin, or virtually any other skin obtained from a relatively small animal, e.g., antelope.
The important distinction between vellum (or parchment) and leather is that the former is not tanned but is prepared essentially by soaking the skin in lime and drying it under tension.
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