Clean the surfaces of parts to be examined thoroughly of oil and other greasy pollutions with SIM Cleaner and dry carefully afterwards.
Shake SIM Developer vigorously, until the balls are heard clearly, and apply a thin, even layer. Too thick a layer entails vague indication.
Apply SIM Indicator generously on the surfaces of the parts by dipping, brushing, or spraying. After 5-10 minutes’ exposure, remove the bulk of indicator and the remainder with SIM cleaner or water. Wipe parts clean. Leave the cleaner in contact with the parts for as short a time as possible, not more than 2 minutes.
A few seconds after the application of SIM Developer, defects on the surface, if any, begin to appear. The indication gradually increases in intensity and is definitive after about 10 minutes. In certain cases a somewhat longer developing time is required.