Material: extrawhiteglass Refractive index: 1.513— 1.523 (measured between 546.07 nm and 643.85 nm) Density: (2.47 ± 0.01) kg/dm3 Chemical composition • Si02 (Silicon Dioxide): 72.20%: • Na20 (Sodium Oxide): 14.30%: • K2O (Potassium Oxide): 1.20%: • CaO (Calcium Oxide): 6.40%: • MgO (Magnesium Oxide): 4.30%: • AI2O3 (Aluminum Oxide): 1.20%: • Fe203 (Ferric Oxide): 0.03%: • S03 (SulfurTrioxide): 0.30%. The microscope slides Menzel are clean and defatted, transparent and without any kind of selective adsorption. The production is completely automated to eliminate dirty, dust, flaws and breakings: in this way the production guarantees slides regular in dimension and surface. The raw material's high quality guarantees long life and stability during the time. The microscope slides Menzel are resistant to enzymatic procedures and microwaves (suggested power: 750 - 800 watt).