Dating historic window glass
Development of the Australian Flat Glass Industry. Reflections on a Stained-glass Window. All drawings and photographs by Neal A. Shepard Medieval Painted Window Glass. Glass and its Manufacture.
Glass and Pottery Publishing Company, Pittsburgh. Manufacturers of crown glass from onwards, and rolled plate glass beginning in the s.
Allow plenty of time for careful, thorough work. The leading patterns in such windows are complex, particularly in plated windows which have several layers. Glass can also disintegrate from chemical instability or the intense heat of a fire. Finally, windows assembled with long, narrow, angular pieces of glass are inherently prone to cracking. Under these conditions, it is essential to note if the support system or leading pattern has failed so it may be corrected before the window is reinstalled.
If water alone is insufficient, the next step is to use a non-ionic detergent. Chilton Book Company, Radnor, Pennsylvania.
Vogel unless otherwise stated. Colonial Period to the Present.
The construction date, and dates of major additions and alterations, should be ascertained. Bills, inventories, and other written documents often give clues to the date and composition of leaded glass. Moreover, photographs may differ depending on the aspect to be captured. In general, crown glass was used in older construction, with cylinder glass becoming more prominent during the Victorian era as larger windows with fewer individual panes became desirable. More often, the placement of bracing is adequate, but the tie-wires that attach the leaded panels to the primary frame may be broken or disconnected at the solder joints.
These give support, but are almost invisible. In Studies in Building History, edited by E. Zinc cames are too stiff to open up easily, so they must be cut open with a small hack saw and dismantled until the broken area is reached.
They are often principal interior features of churches, hotels, restaurants, railway stations, and civic buildings. Despite the availability of good natural ingredients, each of these early American glassmakers eventually failed due to production and managerial difficulties. Richland Creek Technical Series.
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