In general, “Washable silk” usually would go through some chemical processes such as resin coating and water-repellent process. Although it could protect the silk fiber from weathering by water, the synthetic materials such as resin on the surface would directly contact with the skin like other synthetic fibers. The specific texture of silk would also be impaired by the chemicals.
Unlike these surface-processed silk, “SHIDORI” is using a new technology which specifically work on the high-quality protein (Amino Acid) molecules that present in natural silk. All the features and texture of natural silk would be preserved while the strength of the fabric is enhanced for ordinary machine washing at home. With the new technology of SHIDORI, pure silk could even be used in garments that require daily washing such as towels and underwear.
Testing item |
General standard |
SHIDORI Score |
|
Resistant to light (JIS-L0842) | Above 3 |
Above 4 |
|
Resistant to washing (JIS-L0844) | Discoloration | 4 |
5 |
Pollution | 2-3 |
4-5 |
|
Pollution to washing agent | - |
5 |
|
Resistant to sweat (JIS-L0848) |
Acidic - Discoloration | 4 |
5 |
Acidic - Pollution | 2-3 |
4-5 |
|
Alkaline - Discoloration | 4 |
5 |
|
Alkaline - Pollution | 2-3 |
4-5 |
|
Resistant to dry cleaning (JIS-L0860) | Discoloration | 4 |
5 |
Pollution | 3 |
4 |
|
Resistant to rubbing (JIS-L0849) | Dried | 3 |
4-5 |
Wetted | 1-2 |
4 |
|
Dimensional change rate (%) 103 method (Attack) |
Vertical | ±3 |
-0.8 |
Horizontal | ±3 |
-0.8 |
(Institute of Consumption Science ltd.) |
* The above test results are just for reference and are not guaranteed. Please be advised that the obtained data might vary with the origin of raw materials or the weaving methods etc.
While coloration of Silk is normally done in a “Continuous dyeing bath*”, “Single dying bath” is used for SHIDORI silk. As silk is a kind of natural fibers, coloration of silks from different origins or harvest time could possibly result in different colors even using the same pigment. When the clothes are produced in bulk, it is necessary to ensure every single piece of product could be dyed into the same color. “Single dying bath” enables digitalization and reproduction of a specific color. Therefore, the same color of silk could be accurately dyed anytime according to the request of garment brands and designers, regardless of the judgment of craftsmen or the change of weather and climate.
*Continuous dyeing bath
“Continuous dyeing bath” is the practice which reuses dyeing fluid or pigments for different coloration. The remaining dyeing fluid from the previous coloration in the same bath would be retuned into different color and would then be used for the next coloration. This practice could reduce the amount of water used for dyeing. The number of procedures could also be reduced and therefore efficiency is enhanced. However, it is difficult to reproduce the previous same color as the dyeing fluid would be contaminated with different pigments during many times of coloration. The color produced with this method might also vary with different lighting. Therefore, “Continuous dyeing bath” is mostly applied in the coloration of Kimono which is usually tailor-made individually.
*Degumming
Degumming is the removal of the Sericin from the Silk fiber structure (Sericin and Fibroin). It could turn silk from dull white color to silvery white. It also contributes to the smoothness and drapability of the fabric.
*Jet dyeing is the method of coloration by keeping the fabric circulating in the current of pigment fluid. The pigment is ejected from a jet nozzle to push a circular current in the bath and therefore it is called “Jet Dyeing Machine”
** It is the plain fabric without any secondary processing such as printing, dyeing and antistatic procedures.Testing item |
General standard |
SHIDORI Score |
|
Resistant to light(JIS-L0842) | Above 3 |
Above 3 |
|
Resistant to washing (JIS-L0844) | Discoloration | 4 |
5 |
Pollution | 2-3 |
4-5 |
|
Pollution to washing agent | - |
4 |
|
Resistant to sweat (JIS-L0848) | Acidic - Discoloration | 4 |
5 |
Acidic - Pollution | 2-3 |
4-5 |
|
Alkaline - Discoloration | 4 |
5 |
|
Alkaline - Pollution | 2-3 |
4-5 |
|
Resistant to dry cleaning (JIS-L0860) | Discoloration | 4 |
5 |
Pollution | 3 |
4-5 |
|
Resistant to rubbing (JIS-L0849) | Dried | 3 |
4-5 |
Wetted | 1-2 |
2-3 |
|
Dimensional change rate (%) 103 method (Attack) |
Vertical | ±3〜−6 |
−3.9 |
Horizontal | ±3〜−6 |
−6 |
|
Pilling (Class) (JIS-L1076) | Vertical | 2 | 4 |
Horizontal | 2 | 4 | |
Frictional strength (times) (JIS-L1096 E) | 5000 times | ◯ (Normal fabric) | - (SHIDORI fabric) |
7500 times | ◯ (Normal fabric) | - (SHIDORI fabric) | |
10000 times | ◯ (Normal fabric) | ◯(SHIDORI fabric) | |
12500 times | ◯ (Normal fabric) | ◯(SHIDORI fabric) | |
15000 times | × (Normal fabric) | ◯(SHIDORI fabric) |
Testing item |
General standard |
SHIDORI Score |
|
Resistant to light (JIS-L0842) | Above 3 |
Above 3 |
|
Resistant to washing (JIS-L0844) | Discoloration | 4 |
5 |
Pollution | 2-3 |
4-5 |
|
Pollution to washing agent | - |
4 |
|
Resistant to sweat (JIS-L0848) | Acidic - Discoloration | 4 |
5 |
Acidic - Pollution | 2-3 |
4-5 |
|
Alkaline - Discoloration | 4 |
5 |
|
Alkaline - Pollution | 2-3 |
4-5 |
|
Resistant to dry cleaning (JIS-L0860) | Discoloration | 4 |
5 |
Pollution | 3 |
4-5 |
|
Resistant to rubbing (JIS-L0849) | Dried | 3 |
4-5 |
Wetted | 1-2 |
2-3 |
|
Pilling (Class) (JIS-L1076) | Vertical | 2 | 4-5 |
Horizontal | 2 | 4-5 | |
Bursting strength (JIS-L1096 A) | Before washing | 300 | 468 |
After washing 30 times (Attack) | - | 436 | |
After washing 30 times (Emal) | - | 459 |
Testing item |
General standard |
SHIDORI Score |
|
Resistant to light(JIS-L0842) | Above 3 |
Above 3 |
|
Resistant to washing (JIS-L0844) | Discoloration | 4 |
5 |
Pollution | 2-3 |
4-5 |
|
Pollution to washing agent | - |
3 |
|
Resistant to sweat (JIS-L0848) | Acidic - Discoloration | 4 |
5 |
Acidic - Pollution | 2-3 |
4-5 |
|
Alkaline - Discoloration | 4 |
5 |
|
Alkaline - Pollution | 2-3 |
4 |
|
Resistant to dry cleaning (JIS-L0860) | Discoloration | 4 |
5 |
Pollution | 3 |
4-5 |
|
Resistant to rubbing (JIS-L0849) | Dried | 3 |
4-5 |
Wetted | 1-2 |
3-4 |
|
Dimensional change rate (%) 103 method (Attack) |
Vertical | ±5 |
−0.5 |
Horizontal | ±5 |
0.0 |
|
103 method (Emal) | Vertical | ±5 | −1 |
Horizontal | ±5 | 0.0 | |
Dimensional change rate (%) 105 method (Attack) |
Vertical | ±5 | −0.5 |
Horizontal | ±5 | 0.0 | |
105 method (Emal) | Vertical | ±5 | −0.3 |
Horizontal | ±5 | +0.2 | |
Pilling (Class) (JIS-L1076) | Vertical | 2 | 5 |
Horizontal | 2 | 5 | |
Frictional strength (times) (JIS-L1096 E) | 5000 times | ◯ (Normal fabric) | - (SHIDORI fabric) |
7500 times | × (Normal fabric) | - (SHIDORI fabric) | |
10000 times | × (Normal fabric) | ◯ (SHIDORI fabric) | |
12500 times | × (Normal fabric) | ◯ (SHIDORI fabric) | |
15000 times | × (Normal fabric) | ◯ (SHIDORI fabric) |
The above test results are just for reference and are not guaranteed. Please be advised that the obtained data might vary with the origin of raw materials or the weaving methods etc.