Resistance to Solvents
Resistance to Solvents testing is intended to determine the ability of a device to withstand exposure to solvents; the goal is to ensure that the solvents do not cause deleterious, electrical, or mechanical damage, in addition to deterioration of the material or finishes. Marking permanency deals with the ability of the ink to stay on the device.
The resistance to solvents testing consists of immersing three groups of devices into one of three solvents for a minimum of one minute. After fully immersing the device, it is removed and brushed with ten strokes across the portion of the device where marking has been applied. This is repeated two additional times. After the 3rd immersion and brushing, the devices are rinsed and all surfaces air blown dry. After five minutes, the devices are examined to determine if any damage has occurred. Any damage is considered to be a failure as well as any missing, faded, smeared, or blurred markings.