十等分の組合せの地割り説明写真
4ページ
I have
had
several requests for help in preparing a C10 division. I hope that
seeing
photos of it being worked step by step along with some different words
than what you might have read might help. The authors of the books on
the
market have done a great job - but sometimes you just need to see it
from
someone else to get it to click. (you can click on the photos for
larger,
more detailed views). If I may, I suggest that you read it through
in its entirety before beginning to follow it step by step - I think
that
you will find it more helpful to have an overview before beginning
it. Please
note that you may download one copy of these page for personal use -
all
other reproducing without permission is protected.
In
response
to questions I've had on it, there are several ways to work a C10
division,
all perfectly acceptable in Japanese tradition. All three are published
in Japanese books. One requires the Japanese V-ruler, which is
available
in Japan through the Temari Association (discussed elsewhere on the
site),
the other two are based on ruler measurements. Which ever way you are
most
comfortable with is just fine. The goal is to come out with 12 (or more
when worked into deeper divisions that start off of a C10) equal,
evenly
spaced pentagons on the ball, and that is more important than the
actual
process that achieves it.
|
Wrap a mari and choose your marking thread. Locate the north
and south
poles and obi points. The more detailed and complex the division and
pattern
gets, the more you need to be accurate in your division and placing of
pins and threads. Unless you have a perfect eye, I strongly urge you to
measure your strip and divide by 5 to attain the best accuracy
possible.
You will need five pairs of uniquely identified pins - either
five different
colors, sizes, tags or whatever to work the division, in addition to
the
pole pins.
|
|
Using the one-fifth distance that you calculated from the
measurement
of the strip length, fold the strip into fifths and then as whole
together
in half again to get ten sections, and cut a small notch to mark
the places. Note - even if you are not familiar with metric, I
recommend
that you measure in mm or cm, since then all you have to do is divide
by
ten and you have a working number - it is very easy to use the result
rather
than having to cope with tenths of inches if you measure and divide in
inch units.
For example - for a ball that is 24.5cm in circumference,
divide by
5 and you get 4.9 cm. Doing this in inches would not be easy - you end
up with tenths of inches which are not represented on most rulers other
than engineering rules. Fold the strip into five sections each 4.9 cm,
then fold all in half to get ten equal divisions.
|
|
Wrap the strip around the obi and place marking pins at the
ten section
marks. Be sure to keep the pins in the center of the notch and along
the
top edge of the strip in order to accurately remain on the obi. Wrap
the
ten simple vertical marking lines, and tack at the north and south
poles.
Do not wrap the obi, but keep the obi pins in place. You can now remove
the pole pins. I have kept them in only for demonstration/orientation
purposes
in these photos. When wrapping this division and the rest on the ball -
it does not matter what side of the pin you choose to go on, but I
suggest
that you pick one and repeat that throughout the division. |
|
Cut the marking strip exactly in half, or use a new strip
that is exactly
one half of the ball circumference. Divide this new strip into thirds.
If you cannot eyeball it precisely, measure and calculate the one third
amount and measure it off on the strip. Before folding and notching,
ADD
1/100th OF THE BALL CIRCUMFERENCE to this amount. For example, if the
ball
circumference is 24.5 cm, you would add about 2.4 mm to the one-third
amount.
Then, fold and notch the strip. As D. Vandervoort says, "don't ask me
why,
but you have to" - and she is right. |
|
Pick a line to start on. Choose on of the pin pairs. Place it
the 1/3+1/100th
distance from the north pole. Remove the obi pin from that line. |
|
Move two threads to the right, and place a pin from another
different
pair the 1/3+1/100th distance from the pole. Remove the obi pin from
that
line. |
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Last updated 2/01 © From 1998 inclusive G.Thompson