Top Facts about the JIS L 1902 Test Method
Methods of evaluation
JIS L 1902 is similar to standard antimicrobial textile test methods that examine textile materials following a brief incubation period. Ideally, this method is used for high throughput, accelerated turnaround, and substantial volume testing.
Absorption Method
In this method, the test bacteria is inoculated directly onto the sample. The standard contact time for the JIS L 1902 test method is 18 to 24 hours. The number of bacteria present directly after inoculation and after the stipulated contact time is measured and used to estimate the antibacterial activity.
Transfer Method
This evaluation method consists of placing the test bacteria on an agar plate and subsequently transferring them onto the samples. The sample textile materials are kept in contact with the bacteria for five minutes and incubated for 18 to 24 hours. The number of bacteria present directly after inoculation and after the stipulated contact time is measured and used to estimate the antibacterial activity.
Also Read: The ISO 21702 Test Method Explained
Printing Method
In this evaluation method, the test bacteria are placed on a filter and printed onto the samples.
Halo Method
The textile sample is kept in contact with the surface of these inoculated agar plates. The plates are incubated for 24 to 48 hours and then assessed for “halos”. This is a qualitative method that estimates antibacterial activity through the appearance of halos [clear area of growth] around the sample.
The incubation stipulations of the JIS L 1902 test make it one of the most rigorous methods for evaluating antimicrobial activity. This presents a robust replicate analysis and durability of the treated test sample.