Traceability of pharmaceutical products is important because many are available only by prescription, based on need. Their use must be carefully controlled by doctors and pharmacists. They have high value, can be copied, and are needed by a number of people on a regular basis. Tight control of distribution is mandatory, as these products could create any number of health, control, and liability issues. It is therefore important that the distribution channel and, consequently, the integrity of the product, are maintained.
Lasers can produce discreet codes that are only visible to the trained eye.
The mark remains invisible unless personnel know where and how to read it. Gel caps are another market where lasers are being used. For instance, many vitamins have a distinct mark on the gel cap. Attempts to duplicate this mark, which is permanently absorbed by the material, is nearly impossible. Again, this mark has been applied within the existing process, and the laser has significantly increased output.