The glass in previous windows is usually the pretty early 'plate' or 'broad' glass to 'crown' or 'cylinder'.[five] Old glass is recognised by its imperfections ('ream') which cause optical distortion. C – Parting bead. There are 2 parting beads positioned on each side with the sash box, functioning vertically from leading to https://nail-polish71581.digiblogbox.com/60267660/the-best-side-of-sash-windows