we are operating 38 sq m amber glass furnace back fire regenerative type having bubbles problem we have all done as we can .like mr aikhh . ive read his problem .if anyone or Mr Aikhh may give better solution will be great help.
Bubbles were common in glass long ago. Make products that look old, like early window glass with ripples, or reproductions of antique glass objects. There is a good market for those items.
You may find less competition for your lower quality product in the home restoration business. Stained glass is very popular, and if it looks old, all the better.
Buildings in Historic areas prefer old glass, it is sometimes required, and probably hard to find.