"Silica XHL" is a standard grade Silica 60 with a surface area of 500 m2/g, mean pore size of 60A, specific pore volume of 0.75 ml/g, and particle size of 5-17um. The TLC plates contain UV254 fluorescent indicator. This analytical extra hard layer is bound to a glass support. It has a thickness of 250um and dimensions of 20x20cm. There are 25 plates per pack. The layer has an outstanding hardness and is abrasion resistant due to an optimized binder system. The plate can be easily labeled with a lead pencil for clear identification. There is an increased separation efficiency due to an optimized particle size distribution. The UV254 fluorescent indicator has an increased brilliance and a low-noise background which results in a high suitability for trace analyses.