Brushes
Paintbrushes are used for applying ink or paint. These are usually made by clamping
the bristles to a handle with a ferrule. Short handled brushes are for watercolor
or ink painting while the long handled brushes are for oil or acrylic paint. The
styles of brush tip seen most commonly are:
* Round: Long closely arranged bristles for detail
* Flat: For spreading paint quickly and evenly over a surface. They will have longer
hairs than their Bright counterpart.
* Bright: Flat brushes with short stiff bristles, good for driving paint into the
weave of a canvas in thinner paint applications, as well as thicker painting styles
like impasto work.
* Filbert: Flat brushes with domed ends. They allow good coverage and the ability
to perform some detail work.
* Fan: For blending broad areas of paint.
* Angle: Like the Filbert, these are versatile and can be applied in both general
painting application as well as some detail work.
* Mop: A larger format brush with a rounded edge for broad soft paint application
as well as for getting thinner glazes over existing drying layers of paint without
damaging lower layers.
* Rigger: Round brushes with longish hairs, traditionally used for painting the
rigging in pictures of ships. They are useful for fine lines and are versatile for
both oils and watercolors.
A natural/artificial hair brush utilized in one medium (oil paint, acrylic, watercolor,
etc.) should not be used again in a different medium, unless the nature of each
medium and accompanying solvent affects the hairs of the brushes differently. Using
brushes across mediums can cause them to age prematurely. This information does
not apply to synthetic hair brushes.
Paint and solvent residue should be cleaned from brushes after use. After removing
most of the paint from the bristles manually with an appropriate solvent, detergent
and water should be used to clean the brush further. After a thorough cleaning,
natural hair brushes benefit from using a brush conditioner on the hairs to restore
oils. A conditioner can be worked into the bristles which can then be shaped to
a point and left to dry. Before the next painting session, the conditioner should
be removed with water.
Brushes should not be left bristle-end down in solvent for a prolonged period. Doing
so will cause distress to the brush shape and may cause the bristles to splay out
and lose their shape. Methods of suspending brushes in solvent include a metal spring,
a mesh or a clamp. These grip brush handles and do not allow the bristles of the
brush to touch the bottom of the solvent container. Also, leaving brushes in solvent
for a prolonged period can cause damage to the bristles themselves by stripping
oils and swelling, to the ferrule, to the adhesive used to hold bristles in place,
and to the wooden handle.
An environmentally friendly way of removing oil paint from brushes while paint is
wet is to immerse the brush in a container containing vegetable oil. The oil will
naturally cleanse away the oil paint.
A brush is typically used on longer hair, while a comb is normally used on shorter
hair, but can be still used for short hair. A flat brush is normally used for detangling
neat and tidy hair, after a sleep; a round brush for styling and curling hair, especially
by a professional stylist, and with a blowdryer. A paddle brush is used to straighten
hair, but not all work, they are usually used on untidy unkept hair. A hairbrush
is also useful in removing loose hairs, and in increasing circulation to the scalp.
Toothbrush is an instrument consisting of a small brush on a handle used to clean
teeth through tooth brushing. Toothpaste, often containing fluoride, is commonly
added to a toothbrush to aid in cleaning. Toothbrushes are often made from synthetic
fibers, although natural toothbrushes are also known in many parts of the world.
Electric motor or generator to function, the coils of the rotor must be connected
to complete an electrical circuit. To accomplish this, (copper or brass) 'slip rings'
are affixed to the shaft, and springs press braided copper wire 'brushes' onto the
rings which conduct the current. Later, these copper wire brushes were replaced
with carbon blocks; but these blocks are still called brushes.
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