Table 1 Images of the dots in the commercial relative humidity (RH) indicators that correspond to specific values for RHs (corresponding to water activities (aw) of food)
| Target food | Storage time (day) | Water activity (aw) | Relative humidity (RH) corresponding to aw of food | Image of the dot corresponding to RH |
|
| Almond | 1 | 0.30±0.01 | 30% |  |
| 2 | 0.34±0.01 | 30% |  |
| 5 | 0.40±0.01 | 40% |  |
| 7 | 0.47±0.01 | 50% |  |
|
| Pastry | 1 | 0.81±0.01 | 80% | -1) |
| 2 | 0.77±0.02 | 80% | -1) |
| 5 | 0.38±0.00 | 40% |  |
| 7 | 0.34±0.01 | 30% |  |
|
| Red pepper powder | 1 | 0.55±0.00 | 60% |  |
| 2 | 0.54±0.01 | 50% |  |
| 5 | 0.38±0.00 | 40% |  |
| 7 | 0.34±0.01 | 30% |  |
1)The dot does not exist within the specified water activity range