Transparent glass

1. Clear sheet glass - Also called Drawn sheet glass

• B.S. 952 state 
• Sheet glass has natural fire - finished surfaces but because of the 2 surfaces are never perfectly flat and parallel . 
• There is always some distortion of vision and reflection  
• There are mainly 3 main B.S. Grades : 

(i) OQ - Ordinary Glazing Quality
(ii) SA- Selected Glazing quality
(iii) SSQ - Special selected glazing quality .

2.Clear plate glass

• B.S. 952 plate 
• This glass has "flat & parallel" surface producing clear vision and reflection . 
• Wired clear plate glass . 
• 27 is 6mm thick & the normal size of the plate is 330 x 183 mmm , both Georgian & diamond pattern's of plate glass specified in the B.S. 952 

(i) GQ - Glazing Quality  -for general use / works
(ii) SG - Selected glazing quality - suitable for superior work to make mirrors .
(iii) SQ - Silvering quality - Suitable for high class mirrors .