Design Process and Window Assembly

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Shop now in stores at Nordstrom .com or download the Nordstrom app . Stained glass refers to colored glass as a material or art and architectural works Although it is traditionally made in flat panels and used as windows , the creations of modern stained glass artists also include three dimensional structures and sculptures . Modern vernacular usage has often extended the term stained glas s to include domestic lead light and obje d'ar created from glasswork . For example in the famous lamps of Louis Comfort Tiffany . It may then be further decorated in various ways . in which small pieces of glass are arranged to form patterns or pictures, held together traditionally by strips of lead, called cames or calms and supported by a rigid frame . Painted details and yellow colored silver stain are often used to enhance the design The term stained glass is also applied to enameled glass, in which the colors have been painted onto the glass and then fused the glass in a kiln . Stained glass as an art and a craft requires artistic skill to conceive an appropriate and A window must fit snugly into the space for which it is made, must resist the w ind and rain, and also, especially in the larger windows, must support its own weight . Many large windows have withstood the test of time and remain sustainably intact since the late Middle Ages . In Western Europe, together with illuminated manuscripts, they constitute a major form of medieval visual art to have survived the present day . In this context, the purpose of a stained glass window is not to allow those within a building to seize the world outside , or even primarily to admit light, but rather to control it . For this reason stained glass windows have been described as illuminated wall decorations . The design of a window may be abstract or figurative may incorporate narratives drawn from the Bible, history or literature, may represent saints or patrons, or use symbolic motifs , in particular or mori al . Windows within a building may be thematic, for example. Within a church, episodes from the life of Chr Factories were set up where there was a ready supply of silica , the essential material for glass manufacture . Silica requires a very high temperature to melt. Something not all glass factories were able to achieve . Such materials as potash, soda, and lead can be added to lower the melting temperature . Other substances such as lime are added to make the glass more stable . Glass is colored by adding metallic oxide powders or finely divided metals while it is in a molten state . Copper oxides produce green or bluish green. Cobalt makes deep blue , and gold produces wine red and violet glass . Much modern red glass is produced using copper, which is less expensive in the furnace is known as pot metal glass as opposed to flashed glass, which fuses a thin layer of colored glass to a thicker layer of colorless glass to produce a design Using a blow pipe, a glass maker will gather a glob of molten glass that was taken from the pot , heating in the furnace . The gather is formed to the correct shape, and a bubble of air blown into it . Using metal tools, molds of wood that would have been soaking in water and gravity , the gatherer is manipulated to form a long cylindrical shape . As it cools, it is reheated, so that the manipulation can continue . During the process, the bottom of the cylinder is removed . Once brought to the desired size, it is left to cool . One side of the cylinder is opened, and the cylinder is then put into another oven to quickly heat and flatten it , and then placed in an annealer to cool at a controlled rate , making the material more stable An blown or mouth blown cylinder, also called muff glass, and crown glass, were the types used in the traditional fabrication of stained glass windows Crown glas s is hand blown glass created by blowing a bubble of air into a gather of molten glass. The centrifugal force causes the molten bubble to open up and flatten . It can then be cut into small sheets. Glass formed this way can be either colored and used for stained glass windows or uncolored as seen in small paned windows in the sixteenth and seventeenth century houses . Concentric curving w aves are characteristic of the process . The centre of each piece of glass, known as the bullse ye, is subject to less acceleration during spinning by the ponteel rod, which holds the glass as it is spun out . The lumpy refractive quality means the bullseyes are less transparent , but they have still been used for windows, both domestic and ecclesiastical . Crown glass is still made today, but not on a large scale Rolled glass, sometimes called table glass, is produced by pouring molten glass onto a metal or graphite table and immediately rolling it into a sheet using a large metal cylinder, similar to rolling out a pie crust . The rolling can be done by hand or by mach ine . Glass can be double rolled, which means it is passed through two cylinders at once, similar to the clothes ringers on older washing mach Glass is then annealed . Rolled glass was first commercially produced around the mid eighteen thirties and is widely used today . It is often called cathed ral glass, but this has nothing to do with medieval cathedrals, where the glass used was hand blown . Architectural glass must be at least an eighth of an inch th ick to survive the push and pull of typical wind loads . However, in the creation of red glass, the coloring ingredients must be of a certain concentr ation, or the color will not develop . This results in a color so intense that at the thickness of an eighth inch, the red glass transmits lig little ht and appears black . The method employed to create red stained glass is to laminate a thin layer of red glass to a thicker Colored molten gather is dipped into a pod of molten red glass, which is then blown into a sheet of laminated glass using either the cylinder muff or the crown technique . Once this method was found for making red glass , other colors were made this way as well . A great advantage is that the doubled layer ed glass can be engraved or abrad ed to reveal the clear or tinted glass below . The method allows rich detailing and patterns to be achieved without needing to add more lead lines, giving artists greater freedom in their designs . A number of artists have embraced the possibilities flash glass gives them . For instance , sixteenth century heraldic windows relied heavily on a variety of flash colors for their intricate crusts and creatures . In the medieval period the glass was abraded. Later hydrofluoric acid was used to remove the flash in a chemical reaction , and in the nineteenth century sandblasting started to be used for this purpose. Islamic civilization played a major role in inspiring the art of stained glass from the eighth century onward . Beauty and function were essential elements of design in Islamic civilization . Perhaps in an effort to supply thousands of mosques, but also thanks to the input provided by thriving scientific activity in fields such as optics and chemistry. Islamic glass makers transformed what had previously been a craft into Islamic stained glass . An industry employing new technologies in a large workforce from across Islamic civiliz ation . Across Islamic Civiliz ation, glass vessels were mass produced from the eighth century on wards, either by blowing liquid glass in chambers or by cutting it from crystal . Class makers in Syria and to a lesser ext ent Egypt inherited and improved upon this glass making technique, developing their own techniques for mastering the art of Islamic stained glass, its coloring, etc The history of stained glass in Syria dates back to ancient times , as Syria was influenced by successive civilizations , such as the Roman and Byzantine . Syrian stained glass is character ized by its intricate geometric and floral designs, reflecting the skill of Syrian artisans . There are a number of glass factories, particularly in Germany, the United States, England, France, Poland, Russia, and Syria, which produce high quality glass , both hand blown, cylinder disc and crown, and rolled, cathedral and opales cent . Contemporary stained glass artists have a number of resources to draw on in their work for centuries from other artists, from whom they learn, continuing the tradition in new ways. In the late nineteenth and twentieth centuries, there were many innovations and techniques and types of glass used . Many new types of glass were developed Tiffany glass and stained glass panels. The primary method of includ ing color in stained glass is to use glass originally colorless that has been given coloring by mixing with metal oxides and its melting hot metal glass . A second method sometimes used in some areas of windows is flashed glass . A thin coating of colored glass used to colorless glass or colored glass to produce a different color . In medieval times glass flashing was especially used for reds as glass Another group of techniques give additional coloring, including lines and shading, by treating the surfaces of the colored sheets , and often fixing these effects by a light firing in a furnace or kiln . These methods may be used over broad areas, especially with silver stain, which gave better yellows and other methods in the Middle Ages . Alternatively they may be used for painting linear effects or polychrome areas of det ail . The most common method of adding the black linear painting necessary to define stained glass images is use of what is variously called glass paint, vitreous paint, or grisi paint . This was applied as a mixture of powdered glass, iron or rust fill ings to give a black color, clay and oil, vinegar or water, for a brushable texture, with a binder such as gum arabic . This was painted on the pieces of colored glass, and then fired to burn away the ingredients giving texture, leaving a layer of the glass and colouring fused to the main glass piece . Silver stain introduced soon after thirteen hundred, produced a wide range of yellow to orange colors . This is the stain in the term stained glass . Silver compounds are mixed with binding substances The way the glass is heated and cooled can significantly affect the colors produced by these compounds. The chemistry involved is complex and not well understood . using pot metal glass and was often used with glass paint as the only color on transparent glass . Silver stain was applied to the opposite face of the glass to silver pa It appears to have given the glass some protection against weathering, although this can also be true for paint . They were also probably fired separately, the stain needing a lower heat than the paint . Sanguine Carnation Rouge Cousin or Cousin's rose after its supposed inventor is an iron-based fired paint producing red colors , mainly used to highlight small areas, often on flash It was introduced around 1500 . Copper stain, similar to silver stain, but using copper compounds, also produced reds , and was mainly used in the eighteenth and nineteenth centuries . Cold paint is various types of paint that were applied without firing medieval paint has survived . As well as painting, scratch graffito techniques were often used . This involved painting a color over pot meadow glass of an other color , and then before firing, selectively scratching the glass paint away to make the design, or the lettering of an inscription This was the most common method of making inscriptions in early medieval glass, giving white or light letters on a black background, with later inscriptions more often using black painted letters on a transparent glass background . Ordinary soda lime glass appears colorless to the naked eye when it is thin . Although iron oxide impurities produce a green tint, which becomes evident in thick pieces, or with the aid of scientific instruments . A number of additives are used to reduce the green tint, particularly if the glass is to be used for plain window glass rather than stained glass windows . These additives include manganese dioxide, which produces sodium permanganate and may result in a slightly mauve tint, characteristic of the glass in older houses in New England . Selenium has been used for the same purpose While very pale green is the typical color of transparent glass, deeper greens can be achieved by the addition of iron to oxide , which results in a bluish green glass . Together with chromium, it gives glass of a richer green color, typical of the glass used to make wine bottles . The addition of chromium yields dark green glass, suitable for flashed glass . Together with tin oxide and arsenic , it yields emerald green glass . In medieval times blue glass was made by adding cobalt blue, which at a concentration of zero two five percent to one percent in soda lime glass achieves the brilliant blue characteristic of Chartre Cathedral The addition of sulfur to boron rich porosilica glasses imparts a blue color . The addition of copper oxide at two to three percent produces a turquoise color . The addition of nickel at different concentrations produces blue, violet , or black glass . Metallic gold in very low concentrations around zero zero one percent produces a rich ruby colored glass, ruby gold . In even lower concentrations it produces a less intense red , often marketed as cranberry glass The color is caused by the size and dispersion of gold particles . Ruby gold glass is usually made of lead glass with tin added . Pure metallic copper produces a very dark red, opaque glass . Glass created in this manner is generally f lashed . It was used extensively in the late nineteenth and early twentieth centuries, and exploited for the decorative effects that could be achieved by sanding and engraving . Selenium is an important agent to make pink and red glass . When used together with cadmium sulfide, it yields a brilliant red color known as selenium ruby. Yellow glass was very often achieved by silver stain applied extern ally to the sheets of glass . The addition of sulfur together with carbon and iron salts is used to form iron polysulfides and produ ce amber glass ranging from yellowish to almost black . With calcium it yields a deep yellow color Adding titanium produces yellowish brown glass . And brighten other additives . Cadmium, together with sulfur, results in a deep yellow color, often used in glazes . However, cadmium is toxic . Uranium can be added to give glass a fluorescent yellow or green color . Uranium glass is typically not radioactive enough to be dangerous, but if ground into a powder, such as by polishing with sandpaper and inhaled, it can be carcinogen ic When used with lead glass with a very high proportion of lead, it produces a deep red color . The addition of manganese gives an amethyst color . Manganese is one of the oldest glass additives, and purple manganese glass has been used since early Egyptian history Nickel, depending on the concentration, produces blue or violet or even black glass . Lead crystal with added nickel acquires a purplish color . Tin oxide with antimony and arsenic oxides produce an opaque Extensively by Louis Comfort Tiffany to create a range of opales cent mottled and streaky glasses . The first stage in the production of a window was The subject matter of the window is determined to suit the location, a particular theme, or the wishes of the patron. A small design called a Vidimus, from Latin we have seen, is prepared, which can be shown to the patron . A scaled model maquette may also be provided . The designer must take into account the design, the structure of the window, the nature and size of a glass available, and their own preferred technique. A figurative window could have rows of saints or dignitaries . Scriptural texts or mottos are sometimes included, and perhaps the names of the patrons or the person to whose memory the window is dedicated . In a window of a traditional type it is usually left to the discretion of the designer to fill the surrounding areas with board Opening of the window . A small church window might typically have two lights, with some simple tracery lights above . A large window might have four or five lights . The east or west window of a large cathedral might have seven lights and three tiers with elaborate tracery . In medieval times the cartoon was drawn directly on the surface of a whitewashed table , which was then used as a pattern for cutting, painting, and assembling the window . Providing a template for each small glass piece . The exact position of the lead which holds the glass in place is also noted, as it is part of the calculated visual effect . Each piece of glass is selected for the desired color and cut to match a section of the template . Edges with a tool which can nibble off small pieces . Details of fac es, hair and hands can be painted onto the inner surface of the glass using a special glass paint which contains finely ground lead or copper fillings, ground glass, gum arabic, and a medium such as wine or vinegar The art of painting details became increasingly elaborate and reached its height in the early twentieth century . From thirteen hundred onwards, artists started using silver stain, which was made with silver nitrate . It gave a yellow effect ranging from pale lemon to deep orange . It was usually painted onto the outside of a piece of glass, then fired to make it permanent . This yellow was particularly useful for enhancing borders, canopies, and halos , and turning blue glass into green glass . By about fourteen fifty , a stain known as Cousin's rose was used to enhance flesh tones . In the sixteenth century a range of glass stains were introduced Painting on glass with these stains was initially used for small heraldic designs and other details . By the seventeenth century, a style of stained glass had evolved and was known as Scenes were painted under glass panels of square format, like tiles and the five years. The colors were then annealed to the glass before the pieces were assembled . And gilding is the decoration of one side of each of two pieces of thin glass , which is then placed back to back within the lead came . This allows for the use of the techniques such as angle gilding and eglomise to produce an effect visible from both sides, but not exposing the decorated surface to the atmosphere or mechanical damage. Once a glass is cut and painted, the pieces are assembled by slotting them into H sectioned lead In modern windows, copper foil is now sometimes used instead of lead . Traditionally, when a window was inserted into the window space, iron rods were put across it at various points to support its we The window was tied to these rods with lead strips, or the Some very large early Gothic windows are divided into sections by heavy metal frames, called fer ramenta . This method of support was also favored for large, usually painted windows of the Baroque period