I opened a double glass that had moisture between the glasses due to lack of isolation. I tried to clean the white crystal like marks that was caused due to the water that penetrate between the glasses. I could not clean them completely, when observed with optical magnification 5x it seems that the glass was "burned". What is the explenation of this "burn" -like phenomenon. How can this surface damage be cleaned?
Thansk luckydog for your answer,
Is the reaction mentioned by you still relevant if the glasses were used as window and were exposed to the sun UV rays during 4 months.What is the influence of the UV on the burns if any?
About the polish, is it a common repair procedure for general purpose windows (concerning expenses and material loss), and can you give som emore details about the procedure, like what is the glass removal , what technique is used .....
Thanks luckydog for your answer,
Is the reaction mentioned by you still relevant if the glasses were used as window and were exposed to the sun UV rays during 4 months.What is the influence of the UV on the burns if any?
About the polish, is it a common repair procedure for general purpose windows (concerning expenses and material loss), and can you give som emore details about the procedure, like what is the glass removal , what technique is used .....
If the glasses were used as window under high moisture condution for long time, the chemical reaction could happen. I did not have the data or experiemnt about the influence of sun UV. Based on the theory, UV could make Na+ diffusion fast, more sodium ions appear on the glass surface when the water continues react with Na+ ions. In thus way, UV could speed us the reaction. This is just an assumption. I think the key factors are the moisture on the surface of glass and more sodium in the glass composition.
If two pieces glass are put together under high moisture, they could bind together.
Cold end work is very expansive. Before the float glass manufactureing time, flat glass industry used grinding and polishing method to remove the glass and to make the glass very flat.
I don't know if I answer your question.
Reply to [B]dj[/B]:
You called it burned. Actually it was a chemical reaction. We always talk about chemical durability of the glass. Some are poor because of the glass composition. If there are a lot of Na+ ions in the soda lime silicated glass, the Na+ ions could react with water while there is enough moisture on the glass surface. The reaction product could be Na2CO3 on the glass surface. You can see a lot of white spots which could combine two pieces glass together.
If you want to clean it, you smooth and polish it.