Portable kit for Penetrant testing :
1. For field use penetrant materials are packed in aerosol spray cans.
2. A set of cleaner / remover, penetrant and developer are all that required to carry out the field examination.
3. Aerosol cans provide uncontaminated liquids for the examination and can have a shelf life of 5 years. However, if the pressure inside the can drops significantly, the can becomes useless.