If sodium lime is used acidic solvents as an absorption agent, the colour condition of the indicator is to be checked on a daily basis.As soon as this condition has shifted to BLUE in the half of the absorber material, this is the very last moment to replace the material for safety reasons.If such a colour shift cannot be observed over an extended period of time, this may be attributable to the fact that an acidic over-saturation of the material has caused a de-colouration; this may then appear as"normal", but it will definitely result in the destruction of the pneumatic system after some time.This situation is explicitly excluded from the warranty coverage!