What Causes the Waves in Old Glass?

Save

Have you ever wondered why the window panes in many old houses have a wavy, distorted look to them? The charm of old glass is due to the process by which it was manufactured.

Crown Glass

  • In the early 1800s, window glass was made by blowing a bubble of glass, which was then spun until it was flat. This process left a bump, or crown, in the center.

"Bull's-eye" Windows

  • Despite the imperfection of crown glass, early Americans did not let any part of it go to waste; such "bull's-eye" glass is commonly found in old buildings.

Cylinder Glass

  • By the 1850s, crown glass was superseded by cylinder glass, in which molten glass was blown into a cylindrical shape, then opened up into a clear sheet of window glass.

How To Tell The Difference

  • When you look at crown glass from the side, you will see subtle swirls or ripples caused by the spinning process. Cylinder glass has faint parallel ripples, caused by the differences in the circumferences of the cylinder that made it.

Cleaning Old Glass

  • Aging and weathering leaves minute pits in the surface of old glass. The antique window specialists at Fairview Glass Co. recommend cleaning old glass with a paste glass cleaner that can be buffed.

Related Searches

References

  • Photo Credit Image by Flickr.com, courtesy of David Masters
Promoted By Zergnet

Comments

You May Also Like

  • The History of Stained Glass Windows

    Stained glass is made by adding colored metallic salts during its manufacture. The process of creating these windows involves arranging pieces of...

  • What Are the Bubbles in Old Glass?

    Bubbles in old glass bottles and windows are actually air pockets that became trapped during the manufacturing process. Crude glass almost always...

  • How to Get Wavy Hair Using Curlers

    Are you looking to get rich, luxurious waves in your hair, without causing damage from chemical treatments, or the heat of hot...

  • How to Clean Old Window Glass

    Old window glass can add a vintage look to a home of any age. The imperfections in the glass enhance the window...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!