Opal Glass
Opal Glass:-
Opal glass is obtained by adding fluoride in the glass composition. Fluoride is added in the form of calcium fluoride (CaF₂) because it is available easily.
Jena Glass
Jena glass:- it is a mixture of zinc and barium borosilicates. Jena glass has very low thermal expansion and contraction thus it is used to make laboratory glassware and kitchen glassware. Use of pyrex and Jenna glass almost same.
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