Window in a Listed Building,3 - Glass Cleaning Tests

It is clear that the glass needs to be cleaned, but the concern always is about the stability of the paint, especially as here where the paint has already corroded. I took fragments of glass that will have to be replaced to do the tests upon. Then image below shows -from the left

- a piece of glass taken from the panel with no other work done upon it

- in the middle, a piece of glass soaked in plain water overnight and scrubbed

- and on the right, a piece of glass further scrubbed with soap.


These show no visible paint loss. So the decision is to soak the glass overnight in plain water and scrub with a nylon brush, using soap if needed.

The previous entries in this series can be found at:
http://verrier-glass.blogspot.com/2009/06/window-in-listed-building-1.html

http://verrier-glass.blogspot.com/2009/06/window-in-listed-building-2.html