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Rosin - also know as colophony from its origin in Colophon, an
ancient Ionic city (South-Western costal area of present day Turkey
originally founded by Greek settlers.) - is a solid form of resin
obtained from various species of pine tree. Raw resin is collected
from designated trees and then steam distilled in large copper
stills at temperatures of up to 160 degrees Celsius. The distillation
separates oil of turpentine from the non-distillable colophony
residue, which is then purified. The colophony comes to the market
in lump, clot or powder form and varies in colour from yellow to
black according to the age of the tree from where the pitch is
drawn and the amount of heat applied in its distillation.
To make instrument rosin the raw colophony is melted together with
other natural products such as larch turpentine oil, Venetian
turpentine, scraped resin, Carnauba wax, mastic and beeswax.
The list is incomplete however it should suffice to say that
exactly which ingredients are added to the melting process, their
ratios and the temperatures reached during the melting - namely "the
recipie" - are a closely guarded secret of each rosin prodcer
because they determine the finished quality and hardness of the
rosin. In general dark-coloured rosin is a little harder than
light coloured rosin.
In addition to stringed musical instrument usage
- rosin is used extensively in the manufacture of soaps, printing
inks, varnishes, adhesives, sealing-wax, flux for soldering metals,
as a pharmaceutical ingredient and for a large variety of other
minor purposes. In a friction-increasing capacity ballet dancers,
baseball pitchers, ten-pin bowlers and bull riders may rub powdered
rosin into their shoes, hand or glove to prevent slipping, add
grip or for better ball control.
When viewed under a microscope the outer surface
of horsehair is quite rough - as though covered in segments that
look rather like tiny barbed hooks. To produce a sound from your
instrument you first need to make the string vibrate by drawing
your bow across the string. Hair without rosin will simply slide
over the strings as though covered in soap - so in order to increase
friction and make the hair grip or "bite" the string
- a regular application of rosin is required.
It all boils down to personal preference but in general
in colder countries or playing situations you'll go for a softer
rosin to give you that extra adhesive-friction where-as for those
of you who play in hotter climates or regularly in hot sticky theatre-pits
or concert halls you'll probably opt to use a harder rosin or possibly
even a powder rosin. Students tend to follow their teachers choice
or recommendation. Some players - once they've found a brand that
they like - will stick to it for their entire career while other
players may use different grades between summer and winter and
something entirely different again for solo playing.
We're starting off with the most popular brands and
shall add more makes as and when we can. Should you want a brand
or certain grade that isn't listed just drop use an e-mail or call
by telephone and we'll order one in for you.
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