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On this page, you'll find: A Brief Description of Mohair
Mohair is a luxury fiber admired and desired the world over. This
beautiful fiber is prized for its luster, softness and strength.
A good mohair fleece will be characterized by locks or bunches of
mohair fibers held together by the curl of the fleece, with a light sheen
of oil and a good long staple. Angora goats produce as much as an inch of
fiber a month. Since angora goats are usually shorn twice a year, fleeces
have a four to six inch staple.
The grease in a mohair fleece helps to protect the fibers from the
dust, sun and rain. Too little grease in the fleece results in a fluffy,
dull looking fleece--often with poor lock formation. Too much grease gives
the fleece a black look and will be difficult to wash. A light coating of
grease keeps the luster in the fleece, protects it from the weather and
felting and helps to hold the locks together. The grease in a goat fleece
in not lanolin.
Mohair ranges from very fine and soft to coarse and scratchy. Kids
produce the finest fiber and the first shearing (or fall clip) is the
finest of all. These fleeces generally have very little oil, are very soft
and are in the range of 20-24 microns. Kids start producing quality fiber
by the second clip (spring clip). Progressively, as the animal ages, the
mohair gets coarser, and the average fiber diameter increases. Bucks tend
to get coarse faster than does, but produce considerably more fleece.
Wethers (castrated males) do not coarsen as fast as bucks and produce
heavier fleeces than does. Wethers are excellent fiber growers as they
don't have the stress of the rut or kidding and lactation. Definition of Kemp
Mohair and wool share several growth characteristics that set them
apart from the typical hair growth patterns of other animals. Mohair is
similar to most animal hair coats in that it is comprised of two types of
fibers -- a coarse outer coat of fiber produced by primary follicles and a
fine undercoat grown by secondary follicles. In most animal coats, the
primary follicles produce guard hairs that shed rain and protect the
undercoat of fine downy fibers that insulate the animal.
Angora goats and many sheep breeds are unusual in that the production
of fibers by the secondary follicles overtakes the primary follicle
production making these fibers rare in the fleece. In angora goats it is
the secondary follicles that produce most of the true mohair fibers,
although in highly bred goats some primary follicles also produce true
mohair fibers.
The difference between fibers produced by primary and secondary
follicles lies in their structure. All fibers are formed with an outer
layer of cells called the cuticle and an inner core of cells called the
cortex. The fibers produced by many primary follicles of the angora goat
and most animals also contain a hollow core of dead air filled cells. This
medulla traps air and adds to the insulating ability of the fiber and to
its opaque appearance.
Over 65% of the volume of a kemp fiber is airspace, which reduces the
fiber elasticity, strength and ability to take up dye. "medulated" fibers
also have a hollow core, but are less than 65% airspace by volume and are
not considered to be much of a problem in processing mohair. True mohair
fiber have no medulla and this results in its translucent appearance.
The problem is that without a microscope it is hard to say which fibers
are kemp and which are medulated. The bottom line is these fibers are
coarser than mohair fibers. How much coarser depends on the breeding of
the goat and the size of the medulla (the really big ones being kemp). The
length of these fibers also depends on the breeding of the goat and how
fine or coarse those medulated fibers are. Really short fibers tend to
poke out of the locks and form a fuzz or halo of fibers between the locks.
These fibers will not process with the mohair nor will fibers that are
significantly coarser.
Washing mohair is easy. It can be washed in mesh bags which reduces the
handling of the fiber and helps the locks stay intact. However, the bags
do make it harder to get the fleece clean. The more water that can get
around the fiber, the easier it is to clean. It is best to wash only 4-5
pounds of fiber at one time. The steps below will guide you through the
process with ease.
More information:
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Kemp and
medulated fibers are undesirable. Kemp fibers are coarse, hollow and
often short fibers that tend to be stiff and opaque and often deeply
pigmented. Kemp fibers are very undesirable because they stick out of
yarns and finished garments and are scratchy. (See black medulated fibers
in the photo right.) medulated fibers are slightly coarser than true
mohair fibers and have an interrupted or partially hollow core. Often they
are as long as true mohair fibers. medulated fibers are also undesirable
although not as big a problem as kemp fibers.
Mohair Washing Instructions
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