The Tin Side Detector is very helpful in identifying the tin side. Short-wave UV radiation causes the tin to fluorescence at a frequency that is visible to the human eye. When the lamp is placed on the tin side surface, the tin will fluorescence and produce a milky white image that is visible to the human eye. If you place the lamp on the non-tin side of the glass, the lack of tin results in no fluorescence and therefore only the duller image of the UV lamp is seen. Since the float glass substrate does not transmit the UV light, the tin coating on the opposite side of the glass is not exposed to the UV energy, and therefore it will only fluorescence when the lamp is placed on the tin side of the glass. 

OPERATING INSTRUCTIONS:

You can use the TS4W in two different methods. You can either choose to view the image of the lamp through the glass by placing it on the bottom side of the glass, OR you can tilt the TS4W on the top surface of the glass and view the reflection of the lamp. You may find that one approach may work better for certain glass samples and various lighting conditions. BEFORE performing any tests, we recommend putting on the UV blocking safety glasses that were supplied with the product.