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Feather |  |
?? White
goose in China is a major poultry, just like chicken and duck.
Feather is a by-product. Goose down is also famous for use in
production of comforter and Ski-wears.
中国で水鳥はチッケンと同じように主食です。水鳥の羽はよく出っています。ダウンはスキーの服や毛布もとても有名です。
This is all about Feather. How they make from raw material to
ready to manufacture a shuttlecock. 下記は羽の作り方。 |
1 |
wash and bleach
洗う、漂白 |  |
Feather has to be sanitized. Bleaching makes the feather
whiter. | | 2 |
drying
乾燥 |  |
Feather usually sun dried or oven dried. | |
3 |
sorting
選別 |  |
Feather is sorted from same side of wing. Both left & right
feathers will be used. But, all left feathers or all
right feathers will be planted on the same shuttlecock.
Shuttlecocks made from left feathers are usually more stable
in flights.
Lower grades will be re-exported. | |
4 |
cutting
切る |  |
A feather of approximately 8 inches will be cut to 4 inches.
The cut feather is exactly like the one on the shuttlecock.
It's ready for punching to the cork. | |
5 |
angle measure
同じような切った羽を選別 |  |
Cut feather will be measured per their curve. Only
similar angle of curve will be put together. |
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| | | Cork |  |
Cork - The major component forms the Base of the Shuttlecock コルク The bark from the Cork Oak (Quercus Suber). Not only does the cork oak bear the distinction of producing Suberose tissues, it is also, due to its long lifespan (150 to 200 years), certainly the only tree to show a conspicuous production of Suberin, with an excellent capacity for regeneration and a protective tissue characterized by extraordinary physic-mechanical and chemical properties.  Cork Forests in the Mediterranean These are the result of the particular structure and chemical composition of cork. This tree grows mainly in regions with a Mediterranean climate and Atlantic influence. On closer examination, cork reveals an alveolar structure, analogous to that of a honeycomb. Its minuscule alveoli are compactly arranged, with no empty spaces, and their dimensions are so minute that one cubic centimeter of cork contains around 42 million cells. |
 | Since that time, cork has very rightly been regarded as the best material for closing bottles of all types of wine. Besides sealing without allowing any defects to get in contact with the wine, it also makes the bottles easy to open. It has unique properties, such as elasticity, compressibility, impermeability, imputrescibility and adhesion. |
Indeed, when centuries-old objects made of cork were found at the bottom of the ocean, they had retained their original characteristics almost unchanged. By the same token, when a cork stopper is compressed to half its diameter by the machine that fits stoppers into bottles, it regains, due to its multi-cellular structure, about 85% of its volume immediately, and about 94% after 24 hours.  | It is its extraordinary elasticity that explains how cork is able to maintain its full sealing capacity for more than a hundred years. Owing to the waxes and fatty acids in its composition, it is resistant to penetration by moisture, and is almost impermeable to gases.
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| | | Finishing | |
| 1 | testing テスト |  | Speed & consistency. Wobbling shuttlecocks will be down-graded | | 2 | labeling ラベルを付ける |  | Labelling of the small round label inside the shuttlecock and also the tube cover and outside of the carton box as well | | 3 | packaging チューブに入れる |  | Shuttlecocks are packed in 12 pcs; 6 pcs or 3 pcs. It has a cover sheet round the tube and shrink-wrapped | | 4 | box 箱に積む |   | 2 inner boxes of 25 dozens each will be put inside one 50 dozens box tapped and band-wrapped. It labels the Grade & Speed at the outside of the box. |
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| Speed Chart | |
| international | metric wt. | grain | description | | 1 | 48 | 75 | slow, for use in highland | | 2 | 49 | 76 | medium slow, for use in hotter area | | 3 | 50 | 77 | medium, most sea level area | | 4 | 51 | 78 | medium fast, cold area | | 5 | 52 | 79 | fast, cold area, below sea level |
Speed of Shuttlecock is one of the key factor. A shuttlecock which is good in Hong Kong may not be good to use in London. Because there's differences in temperature; humidity; altitude and air pressure etc. In an IBF tournament, most of the Chief Referee will test up to 3 different speed of shuttlecocks to ensure that particular speed is right for that particular place at that particular time. Fast or slow do not represent the quality of the shuttlecock. But, of course, the consumer has the right to choose. Table above is the 3 most common system using right now:
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手作り布マスク
スカッシュ
Shuttlecocks made of superior grade Chinese Goose Feather. Whiter in color and very durable, consistency in flight.
