1100oC

Fine grained ingredients closely controlled for quality,are mixed to make a batch.

Soda Ash (Na2O)To lower Melting point

(12 - 14%)

Silica Sand (SiO2) – Primary RM (70 - 74%)

Limestone (CaO)To reduce solubility

(6 - 12%)

Dolomite(MgO)To reduce solubility

(0 - 4%)

Feldspar (Al2O3)To increase hardness

(0 - 2%)

The batch then flows into the furnace,which is heated up to 1500oC

1500oC

Molten Glass from the furnace gently flows overthe refractory spout on to the mirror-like surfaceof molten tin, starting at 1100oC and leaving

the float bath as solid ribbonat 600oC.

If certain metaloxides are mixed tothis batch they impartcolors to the glassgiving it a body tint.

Broken glass akacullet, is added to

the mixture to the tuneof nearly 25% - 30%which acts primarilyas flux (helps in

reducing the meltingreducing the meltingpoint of the batch)

Despite the tranquillity with which the glass is formed,considerable stresses are developed in the ribbonas the glass cools. The glass is made to movethrough the annealing lehr where such internal

stresses are removed, as the glass is cooled gradually.

To ensure the highest qualityinspection takes place at every stage.

Diamond steels trim off selvedge – stressededges- and cut ribbon to size dictated bythe computer. Glass is finally sold

only in square meters.

Glass is packed with suitable packaging in woodencrates to avoid any kind of damage during the transit

and is then loaded into the containersto be shipped to the destination.

www.aisglass.com

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