JIS R 1702 (Antibacterial Test for Photocatalysts)
This is the antibacterial testing method for antibacterial processed products containing photocatalysts. It can be applied to both flat materials and fibrous materials. There are two types of testing methods: the film adhesion method and the glass adhesion method. The film adhesion method is applied to flat materials, while the glass adhesion method is applied to fibrous materials.
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basic information
- Necessary information for conducting the test To provide a smooth estimate, it would be helpful to receive the following information: - Number of types of specimens - Whether unprocessed test samples are prepared - Required deliverables* (if there are any besides the Japanese report) - Test microorganism species (if you wish to conduct tests with species different from the specified ones) - Illumination intensity and exposure time for light irradiation (refer to the test method) * Unless there are specific requests, the report will only be in Japanese (including test methods and test results (results of determining test conditions, viable cell counts, antimicrobial activity values), without images).
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Price range
P2
Delivery Time
P4
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Applications/Examples of results
**Testing Method** - **Film Adhesion Method** Place a glass rod on a Petri dish with a humidity control filter paper moistened with sterilized water, and then place the test specimen on top. Inoculate 0.15 mL of the test bacterial solution (prepared using 1/500 nutrient medium, 10^5–10^6 CFU/mL) onto the photocatalytic antibacterial treated surface of the test specimen, cover it with a polyethylene film (surface area 800–1600 mm²), and cover the Petri dish with glass. - **Glass Adhesion Method** Place a glass rod on a Petri dish with a humidity control filter paper moistened with sterilized water, and then place a glass plate (55–60 mm square) on top. Place the test specimen, inoculate 0.2 mL of the test bacterial solution (prepared using 1/20 nutrient medium, 10^4–10^5 CFU/mL) onto the photocatalytic antibacterial treated surface of the test specimen, cover it with a glass plate (50±2 mm square), and cover the Petri dish with glass. - **Common** Using a UV irradiation device that has been pre-lit for more than 30 minutes, adjust the position of the Petri dish and the irradiation device so that the test specimen receives the specified illuminance (UV radiation intensity of less than 0.25 mW/cm²). Expose to light for 8 hours at 25±3°C or store in the dark for 8 hours. After inoculating the test bacterial solution, wash the test specimens immediately after inoculation, after 8 hours of light exposure, and after 8 hours of dark storage, and measure the viable cell count.
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