Japan Antibacterial Testing-2003
Norwex Japan Co. Ltd. Date of Issue: May 16, 2003
Japan Spinners Inspecting Foundation
Kinki Head Office
1-18-15 Ue-machi, Chuo-ku, Osaka 540-0005, Japan
Tel: 06-6762-5887
Fax: 06-6762-8588
Date of sample receipt: April 30, 2003 Test No. 604738
Article: cloth
Subject: Test for microorganism eradication
Tested Culture: Staphylococcus aureus NBRC 12732
Escherichia coli NBRC 3972
Test Method:
Culture solution regulated at 2.5 to 10 x 10 cells/ml is dropped on a film (6 x 6 cm square) by 0.4ml using 1/500NB. The culture solution on the film is wiped off by the cloth sample. Then detection on the film surface is performed immediately to measure viable cell count by mixed dilution plate medium culture method. Besides, measurement on another film is also conducted after dropping culture solution in order to exemplify viable cell count before wiping off. The rate of eradication is calculated according to the formula below.
Rate of eradcation (%)
Name of Sample:
Staphylococcus aureus
Escherichia coli
Cloth 99.9% or more
99.9% or more
Date of sample receipt: September 3, 2003
Subject: Test for microorganism eradication
Tested Culture: Staphylococcus aureus NBRC 12732
Escherichia coli NBRC 3972
Test Method:
The above test was completed again in the same manner. However this test was conducted after the cloth sample had been washed 300 times based on the washing resistance
Rate of eradication (%)
Name of Sample: Staphylococcus aureus
Escherichia coli
Cloth 99.9% or more 99.9% or more
This test confirms that the Norwex Microfiber cloth removes 99.9% of bacteria from a surface. It also confirmed that even after washing the cloth 300 times it was still able to pick up 99.9% of bacteria from the surface.
