The insulated glass unit (IGU) that replicates a historic glass window includes a single simulated divided light glass pane, a low-e glass layer, and spacer grills disposed therebetween. True divided light glass window panes are scanned to obtain surface characteristic data, subsequently used to design a pane that includes slumped areas corresponding to the unique topological characteristics of antique glass, separated by flat areas. The flat surfaces provide for sealing the IGU with the spacer grills, while the optics of the original historic glass are preserved via the slumped areas. A mold of the designed pane is then 3D printed in furan resin sand, and a glass layer is melted over the mold to create a one-piece pane that includes the antique features. Accurate replication of these windows enables historic building renovation with modern insulated windows with less sealing while retaining the original appearance, providing improvements in longevity and efficiency.

The insulated glass unit (IGU) that replicates a historic glass window includes a single simulated divided light glass pane, a low-e glass layer, and spacer grills disposed therebetween. True divided light glass window panes are scanned to obtain surface characteristic data, subsequently used to design a pane that includes slumped areas corresponding to the unique topological characteristics of antique glass, separated by flat areas. The flat surfaces provide for sealing the IGU with the spacer grills, while the optics of the original historic glass are preserved via the slumped areas. A mold of the designed pane is then 3D printed in furan resin sand, and a glass layer is melted over the mold to create a one-piece pane that includes the antique features. Accurate replication of these windows enables historic building renovation with modern insulated windows with less sealing while retaining the original appearance, providing improvements in longevity and efficiency.

A kit for making a simulated stained glass article, having a light-transmissive molded plastic substrate with an array of ridges on one major surface, laterally defining a pattern of upwardly open spaces, and a set of light-transmissive molded plastic colored stickers that are respectively peripherally shaped to fit conformingly into the spaces of the pattern. Side walls of the ridges are beveled at an angle sufficient to enable release of the substrate from a mold but are steep enough to facilitate precise placement of the stickers in the spaces and to minimize transmission of light around the edges of the stickers. In an article made from the kit, the stickers and ridges simulate the glass pieces and lead cames of a conventional stained glass window.

A kit for making a simulated stained glass article, having a light-transmissive molded plastic substrate with an array of ridges on one major surface, laterally defining a pattern of upwardly open spaces, and a set of light-transmissive molded plastic colored stickers that are respectively peripherally shaped to fit conformingly into the spaces of the pattern. Side walls of the ridges are beveled at an angle sufficient to enable release of the substrate from a mold but are steep enough to facilitate precise placement of the stickers in the spaces and to minimize transmission of light around the edges of the stickers. In an article made from the kit, the stickers and ridges simulate the glass pieces and lead cames of a conventional stained glass window.