Silica Gel Plates, Alugram®Aluminium backed with 250µm layer. All plates are 20 x 20cm and can be cut with scissors. Silica 60, mean pore 60Å, specific surface (BET) approximately 500m2 per g, specific pore volume of 75ml per g and a particle size of 5 to 17µm. Includes a manganese activated, zinc silicate fluorescent indicator, operating at 254nm.