Ultra Clear Float Greenhouse GlassThickness: 3.0mm, 3.2mm, 4.0mmApplication: Roof of greenhouse projects                 Side wall of greenhouse projects MIGO Ultra Clear Float Greenhouse Glass is a low iron float glass with normal light transmittance higher than 91%.  Low iron content enhances visible light transmittance by reducing the light absorption of the glass. CHARACTERISTICS●Higher light transmittance ensures the plants/flowers more light and vigorous growth.●The extra weight in tempered glass gives your greenhouse much more resistance to high heavy wind and will protect your greenhouse frame from shaking and swinging.●Ultra clear float glass which has been cut to size, processed and edgeworked as necessary,  are heated to about 700°C in a tempering furnace and then chilled rapidly by cold air blown onto both surfaces, effectively increasing the strength of the glass by four to five times. This glass will protect against the kids’ football without breakage.●A greenhouse equipped with safety glass is safer for your family and will have a longer service life than a greenhouse with film, polycarbonate and non-toughened glass if you are locating it in a spot exposed to adverse weather conditions.OPTICAL PARAMETERSThicknessVisible Light Transmittance (370nm~800nm) Visible Light Reflectivity (370nm~800nm)Solar Transmittance      (400nm~1100nm)Solar Reflectivity      (400nm~2400nm)UV Transmittance      (300nm~390nm)3.0mm91.8%8.2%91.2%8%89.5%3.2mm91.6%8.2%91.1%8%89.5%4.0mm91.5%8.2%91%8%89.2%MECHANICAL CHARACTERISTICSMechanical strength (N/mm²)    ≥120       Tempered, EN12150-1Young modulus (GPa)  73.1        Rupture modulus (Mpa)41.4Poisson ratio  0.2    Knoop Hardness (kgf/mm²)  456Density (kg/m³)  2500