This European Standard specifies and classifies special basic products - borosilicate float glass@ indicates their chemical composition@ their main physical and mechanical characteristics@ their dimensional and minimum quality requirements (in respect of optical and visual faults). This European Standard applies to special basic products - borosilicate float glass supplied in stock sizes@ supplied sizes or in cut sizes for final end use. This European Standard does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0@05 m2.