The eldest , Bishambar Dayal Varshnei who died in 1939 , is credited with the introduction of sheet glass manufacturing ( with the Fourcault process ) to Continental Asia ( ex-Japan ) in the 1920s .
The eldest , Bishambar Dayal Varshnei who died in 1939 , introduced hollow ware technoloy to India . 
 His second son , Harish Chandra Varshnei is is credited with the introduction of sheet glass manufacturing ( with the Fourcault process ) to Continental Asia ( ex-Japan ) in the 1920s .