All my paintings are framed with museums glass. This has the advantage of the best protection possible. The almost neutral colored glass makes it possible to look at the painting without any color changes and prevents the distracting reflection which can be really annoying, especially with bigger formats. Furthermore the painting is protected against the UV radiation.
left side museum glass, right side normal glass
An example of a painting framed with museum glass. On the right side of the room is a big window.