Bacteria Decomposition Test - Japanese Chinaware Examination Association
Test Procedure:
Pipette 0.2mg of bacteria suspension on a test porcelain tile and a resin plate (50mm×50mm size)
The test substrates are covered with a piece of polyethylene film.
Light of 500 LUX exposes the test glass for 24 hours. The test needs to be conducted in an environment where temperature is a constant 35℃.
Count the number of survived bacteria
In order to convert the number of bacteria in 1 ml, use SCDLP culture medium and measure the number on the test materials by a pour-plate culture way.
Bacteria decomposition test result on photocatalyst porcelain tile
| Type of Bacteria | Titanium Dioxide | Immediately after illumination (number/ml) | 24 Hours later (number/ml) | % Killed |
| E. coli | None | 3.5 x 105 | 2.0 x 107 |
- |
| TO | 3.5 x 105 | < 10 | > 99.9% | |
| PTA | 3.5 x 105 | < 10 | > 99.9% | |
| MRSA | None | 1.9 x 105 | 9.0 x 104 |
- |
| TO | 1.9 x 105 | < 10 | > 99.9% | |
| PTA | 1.9 x 105 | < 10 | > 99.9% |