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November 2001
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| １.Purpose of this press-release |
JSDA (President; Mr. Gotoh) has been usually conducting information-gathering/evaluation about laundering, and sharing the information/evaluations with consumers.
Under such situation, recently, washing machines that equip a variety of functions like "Centrifugation", "Ion-exchange", "Ultrasonic" and so on have been launched. In August of this year, Sanyo launched a new washing machine so-called "Let's wash with ultrasonic and electrolyzed water". The washing machine allows to select "Standard cycle" that uses detergent and "Detergent zero cycle" that does not require detergent. Since this washing machine has been widely reported as a "Washing machine that does not require detergent" by mass-media, JSDA and our member companies have also received a lot of questions, and mass-media and public attention has been increasing. Therefore, JSDA has conducted evaluation of the machine since August.
JSDA believes that consumers need to make decision on their purchase of washing machines based on objective information. Therefore, JSDA makes a press-release on our tests data with belief that it is for consumer-benefits to share our data with consumers.
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| 2. Abstract of the test data |
(a) Washing performance
It was found that barbecue source for grilled meat and pumpkin-baby-food, which are listed on Sanyo's catalog as removable with "Detergent zero cycle", can be washed out.
On the other hand, it was found by our multiple wearing-washing tests with undershirts worn a day, which are also listed as washable with "Detergent zero cycle", that undershirts were gradually losing their whiteness. This is because such worn undershirts are stained with sebum, which can not be washed out well with "Detergent zero cycle", and the soil is accumulated.
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Washing-out of soil; Male's-underwear after a multiple wearing-washing test
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《Washing conditions》
| Common conditions |
Washed 4 under-wears worn a day together with unworn clothes for adjusting cloth/water ratio (repeated 9 times). Tap water (30 degree C., 5german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 3kg/43L |
| Conditions for "Detergent -standard cycle" |
Cloth/water ratio = 3kg/47L, Detergent: Top (0.05%) |
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L : A company's "Detergent-standard cycle"
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R : Sanyo's "Detergent zero cycle"
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Scanning electron micrograph of fibers
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Close-up
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Washing-out of soil; Shirt after a multiple wearing-washing test
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《Washing conditions》
| Common conditions |
Washed 5 under-wears and 3 shirts worn a day together with unworn clothes for adjusting cloth/water ratio (repeated 10 times). Tap water (30 degree C., 4german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 3kg/43L |
| Conditions for "Detergent-standard cycle" |
Cloth/water ratio = 3kg/47L, Detergent: Attack (0.067%) |
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L : A company's "Detergent-standard cycle"
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R : Sanyo's "Detergent zero cycle"
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Scanning electron micrograph of fibers
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Close-up
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(b) Color/fabric damage
It was found that the fabrics are more easily damaged (lose of shape like elongation, frayed spots, fuzz), and colored garments more easily lose their color when washed with "Detergent zero cycle" by its strong mechanical force and electronically generated hypochlorite.
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Damage of shape in 190 clothes
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Zero cycle is obviously worse.
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14% |
| Zero cycle is worse. |
25% |
| Equal |
61% |
| Standard cycle is worse. |
0% |
| Standard cycle is obviously worse. |
0% |
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Fabric damage;Elongation in sleeve of children's-underwear
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《Washing conditions》
| Common conditions |
Washed unworn clothes 20 times. Tap water (20degree C., 3german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 4kg/43L |
| Conditions for "Detergent -standard cycle" |
Cloth/water ratio = 4kg/47L, Detergent: Ariel Bleach Plus (0.1%) |
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Elongation in sleeve of children's-underwear
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L : New
M : Sanyo's detergent standard cycle
R : Sanyo's detergent zero cycle
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Close-up
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Fuzz in 190 clothes
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Zero cycle is obviously worse.
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7% |
| Zero cycle is worse. |
38% |
| Equal |
65% |
| Standard cycle is worse. |
0% |
| Standard cycle is obviously worse. |
0% |
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Fabric damage (Fuzz)
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《Washing conditions》
| Common conditions |
Washed unworn clothes 20 times. Tap water (20degree C., 3german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 4kg/43L |
| Conditions for "Detergent -standard cycle" |
Cloth/water ratio = 4kg/47L, Detergent: Ariel Bleach Plus (0.1%) |
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L : New
M : Sanyo's detergent standard cycle
R : Sanyo's detergent zero cycle
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Scanning electron micrograph of fibers
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Sanyo's detergent standard cycle
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Sanyo's detergent zero cycle
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Close-up
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Color fading in 182 clothes
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Zero cycle is obviously worse.
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31% |
| Zero cycle is worse. |
20% |
| Equal |
48% |
| Standard cycle is worse. |
1% |
| Standard cycle is obviously worse. |
0% |
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Color fading
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《Washing conditions》
| Common conditions |
Washed a unworn bath towel 20 times together with unworn clothes for adjusting cloth/water
ratio. Tap water (30degree C. , 5german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 3kg/43L |
| Conditions for "Detergent -standard cycle" |
Cloth/water ratio = 3kg/40L, Detergent: Top (0.05%) |
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L : New
M : B company's detergent standard cycle
R : Sanyo's detergent zero cycle
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Close-up
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(c)Re-deposition of soil
Generally speaking, soil which is washed out can re-deposit and/or transfer to other fabrics, which can be prevented when washing with detergent.
When washed with "Detergent zero cycle", it was found that fabrics, especially polyester fabric, of which soil easily deposits, became gradually darkish when repeatedly washed with "Detergent zero cycle".
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Soil re-deposition on polyester swatch
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《Washing conditions》
| Common conditions |
Washed unworn swatches 20 times together with 4 worn clothes and unworn clothes for adjusting cloth/water ratio. Tap water (30degree C. , 5german hardness) |
| Conditions for "Detergent zero cycle" |
Cloth/water ratio = 3kg/43L |
| Conditions for "Detergent -standard cycle" |
Cloth/water ratio = 3kg/47L, Detergent: Top (0.05%) |
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L : New
M : A company's detergent standard cycle
R : Detergent zero cycle
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Close-up
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(d) Cost
It was found that its "Detergent zero cycle" is not always cheaper than its "Standard cycle" as the maximum amount of garments for the "Detergent zero cycle" is 60% of the "Standard cycle", and the "Detergent zero cycle" requires more water and more electricity than the "Standard cycle". The cost depends on amount of garments per wash. For example, when washing the maximum amount of garments at each cycle, "Detergent zero cycle" costs 9.6 yen per kg-garment with sewer cost, and "Standard cycle" costs 6.3 yen per kg-garment. (without sewer cost, 6.3 yen and 4.6 yen, respectively)
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Washing cost for Sanyo washing machine ASW-ZR800 (including water sewage cost)
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| Amount of clothes |
cycle
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Detergent zero cycle |
Detergent standard cycle |
| 4.5kg |
per wash |
43.0 yen |
48.0 yen |
| per clothe |
9.6 yen/kg |
10.7 yen/kg |
| 8.0kg |
per wash |
*86.0 yen
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50.7 yen |
| per clothe |
*10.8 yen/kg |
6.3 yen/kg |
* : Not applicable. The maximum amount of clothes for "Detergent zero cycle" is 4.5 kg.
Breakdown of cost per wash
| Clothes per wash |
cycle |
Detergent
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Water
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Electricity
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Cost
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| 4.5kg |
Detergent zero cycle |
0g |
137L
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130wh |
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0 yen
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40.0 yen
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3.0 yen
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43.0 yen
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| Detergent standard cycle |
24g |
128L |
5wh |
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9.4 yen
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37.4 yen
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1.2 yen
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48.0 yen
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| 8.0kg |
Detergent standard cycle |
28g |
131L |
65wh |
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10.9 yen
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38.3 yen
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1.5 yen
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50.7 yen
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Washing cost for Sanyo washing machine ASW-ZR800 (excluding water sewage cost)
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| Amount of clothes |
cycle
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Detergent zero cycle |
Detergent standard cycle |
| 4.5kg |
per wash |
28.2 yen |
34.1yen |
| per clothe |
6.3 yen/kg
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7.6 yen/kg
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| 8.0kg |
per wash |
*56.4 yen |
36.5 yen |
| per clothe |
*7.1 yen/kg
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4.6 yen/kg
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* : Not applicable. The maximum amount of clothes for "Detergent zero cycle" is 4.5 kg.
Breakdown of cost per wash
| Clothes per wash |
cycle |
Detergent
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Water
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Electricity
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Cost
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| 4.5kg |
Detergent zero cycle |
0g |
137L
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130wh |
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0 yen
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25.2 yen
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3.0 yen
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28.2 yen
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| Detergent standard cycle |
24g |
128L |
5wh |
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9.4 yen
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23.5 yen
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1.2 yen
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34.1 yen
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| 8.0kg |
Detergent standard cycle |
28g |
131L |
65wh |
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10.9 yen
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24.1 yen
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1.5 yen
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36.5 yen
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(NOTE)
Consumption of water and electricity is based on measurement. According to instruction of the washing machine, the amount of detergent used at the standard cycle is 70% of a standard dose recommended on a detergent label. Cost of water is 292 Yen per 1 m3 (details: 184 Yen for water supply, 108 Yen for sewage treatment plant). Cost of electricity is 23 Yen per 1kWh. Cost for detergent is 468 Yen per 1.2 kg-box (according to Sanyo's catalog).
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| 3.Next Plans |
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Based on these test results, we will openly share our information and discuss with industry associations and experts concerned, and continue to share a wide variety of and correct information with consumers for their deep understanding on laundering.
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Japan Soap and Detergent Association (JSDA)
3-13-11, Nihonbashi, Chuo-ku,Tokyo Japan 103-0027 FAX +81 (3) 3281 1870
Copyright(c) Japan Soap and Detergent Association 2000-2006 All Rights Reserved.
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