| 摘要 |
A humidity indicator has a first film (F1) covering the surface of a humidity determination plate (B) and a second film (F2) covering the back surface of the plate (B). At least between the first film (F1) and the surface of the humidity determination plate (B) is formed a flat air layer (Au) on which the entire surfaces of humidity determination surfaces (M1-M4) exposing cobalt chloride (Co) are faced, and small holes (H) allowing the air layer (Au) to directly communicate with the atmosphere are formed with intervals in the first film (F1). As a result, even if a worker directly handpicks the humidity indicator which enables humidity determination by a change in color of the cobalt chloride, the cobalt chloride on the humidity determination surfaces is effectively prevented from adhering to the hand and in turn entering into the body. Further, even if fine dust is produced from base paper of the humidity indicator, the dust is less likely to spread, so that electronic components are effectively prevented from being affected by the dust.
|
