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Since glass is a mix of silicates of sodium and calcium produced by heating or fusing together $\ce{Na2O}$ (Lewis base) with sand or $\ce{SiO2}$ (Lewis acid). Since $\ce{Na2O/NaOH(aq)}$ is a strong base and is used to create water glass(es)$(\ce{Na2SiO3},$ $\ce{Na_xSiO_y}$ etc.).

Is there some procedure in place to create glass by mixing (a base rich) water glass at room temperature with calculated amounts of $\ce{CaO}$ in mould to prepare float glass of definite shape without heating or mild heating?

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    $\begingroup$ Bulk materials are not always easily created from the components. For example, is it easy to create bulk iron from iron filings with heating? $\endgroup$
    – Zhe
    Sep 30, 2019 at 14:49

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Not glass per se, but silica is often produced chemically by silicon alkoxide gelation to create aerogels.

The problem with creating glass by some cold process would be that the reaction side-products, such as water, would have to be removed, leaving holes in a froth of glass. This is fine for creating an aerogel, but is not helpful in making solid objects, such as test tubes or lenses. Of course, you could sinter the glass frit or froth, but that still requires heating.

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