{"id":10096,"date":"2026-01-19T15:44:07","date_gmt":"2026-01-19T14:44:07","guid":{"rendered":"https:\/\/www.frantisekjungvirt.com\/en\/?page_id=10096"},"modified":"2026-01-20T21:00:33","modified_gmt":"2026-01-20T20:00:33","slug":"about-production","status":"publish","type":"page","link":"https:\/\/www.frantisekjungvirt.com\/en\/about-production\/","title":{"rendered":"About production"},"content":{"rendered":"\t\t
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Frantisek Jungvirt Glass Studio\u200b<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Glass artist, designer and painter Franti\u0161ek Jungvirt has been working with glass since 2014. In 2024, he founded his own studio (FRANTI\u0160EK JUNGVIRT STUDIO S.R.O.), where he creates art objects, installations and limited-edition glass pieces.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Franti\u0161ek Jungvirt Studio- butik, Naskove 1189\/1, Prague 5<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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It all began with an idea<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The works are created by glass artist, designer and painter MgA. Franti\u0161ek Jungvirt (*1996) who studied glass painting at the Secondary School of Applied Arts in T\u0159ebo\u0148 and then went on to
graduate from the Glass Studio at UMPRUM in Prague. In his practice, he often draws on the traditions of Czech glassmaking, which he reinterprets through a fresh, contemporary lens. With
each piece, he seeks to push the technical and visual boundaries of the medium. Jungvirt\u2019s work is defined not only by a playful approach to form but also by his use of color and hand-painted
motifs. In addition to functional design, he creates art pieces, installations and limited-edition glass sets. His portfolio ranges from vases designed for everyday use to imaginative artistic objects.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Plush Animals \u2013 collectible vases collection<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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He consults his designs, which he sketches and drafts on paper, with glass masters and workshops from various parts of the Czech Republic. He then finalizes the designs, including the technical details, and moves them towards realization. Franti\u0161ek Jungvirt collaborates with the very best workshops and masters in the field. Thanks to them, he is able to create products of the highest quality and push the boundaries of the glassmaking craft.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Drafting and preparing technical drawings for the moldmaker and production<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The production of each blown vase begins with the creation of the mold<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Using a paper template that replicates the shape of the intended vase, the cavity is hand-turned into the wood on a lathe. The wooden mold is made from hard beech or pear wood, carefully
selected to be free of knots and other irregularities that could compromise the quality of the blown form.<\/p>


Before the actual blowing process, the wooden mold must first be fired with molten glass at a temperature of around 1200 \u00b0C. Depending on the size and complexity of the shape, a wooden mold can withstand the blowing of roughly 50\u2013100 pieces. If larger deviations in the shape occur, the mold is discarded and a new one has to be made. The production of molds is the work of the moldmaker, who is always in close communication with the glassworks for which the molds are produced, as each glassworks has different requirements for molds, opening locks, etc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Paper templates of glass shapes<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Moldmaker\u2019s tools \u2013 chisels<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Turning according to a paper pattern<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Glass Melting<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Glass melting represents the first and also the most important step in the glassmaking process. It is overseen by the melt master, whose work begins after the glassmakers\u2019 shift ends, as by the following day he must prepare a flawless glass batch for production. The primary raw material of the glass batch is high-quality silica sand, mined in Provod\u00edn, Srn\u00ed near \u010cesk\u00e1 L\u00edpa, Velk\u00fd Luh near Cheb, as well as in St\u0159ele\u010d and Mlad\u011bjov in the Hradec Kr\u00e1lov\u00e9 region. Sand makes up roughly 60\u201380 % of the glass batch. The unique properties of crystal are achieved by adding a variety of compounds, such as calcium oxide, sodium oxide or potassium oxide. These oxides are introduced into the batch either in the form of minerals (e.g. limestone) or chemically prepared materials (e.g. soda). These additives influence the properties of the glass. The batch also contains cullet\u2014sorted, clean waste from previous glassblowing sessions. In addition to the main glass-forming raw materials, a variety of additional substances with specific properties are used in glass production\u2014for example, colorants, which are usually expensive metal oxides such as cobalt, manganese, gold, selenium, erbium, cadmium and many others.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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The glassmaker seals the furnace after it has been prepared for melting
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Glass sand<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Glass batch, shards and dyes<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Cullet<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mouth-Blown Glass<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Mouth-blown glass is a specific and demanding discipline. The centuries-old method of blowing crystal glass has changed little since the times of ancient Phoenicia. The skills of glassmakers \u2013 the techniques of glass blowing and melting \u2013 are passed down from generation to generation. Each mouth-blown piece is unique and bears the touch of true masters of the glassmaking craft. Did you know that at least twelve pairs of hands are involved in creating a single blown vase? The glassmakers divide the tasks among themselves, each specializing in a particular part of the production process, so dozens of people usually contribute to every finished product.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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A typical glass workshop usually consists of five people.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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A glassworks with several furnaces and molten colors<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Process of making a mouth-blown vase:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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Gathering molten glass onto the blowpipe<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Reheating the gathered glass<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Glassblowing is not just about the lungs\u2014it relies primarily on skilled hands<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Large products with complex coloring require several scoops of glass.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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The glassmaker reheats the glass batches on the pipe.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Cutting out large bubbles and impurities from the enamel<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Each piece of glass must be rolled in a wooden rolling mill into the required preform, as close as possible to the final shape.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Glass rubies (colored glass cones) for coloring glass (if not from the furnace)<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Cutting preheated glass ruby onto the base glass bulb<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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The glass mold must be kept wet at all times.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Before blowing, the mold must be fired with hot glass.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Burnt mold with black crust<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Glass molds are blown either firmly (non-rotating shapes) or rotatably (rotating with a pipe).<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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The mold is closed until the shape is inflated. <\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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The glassmaker gives the signal to open the mold by raising his foot.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Aligning the bottom of the vase with a stick to make it flat for subsequent grinding<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Comparison of kick temperatures and burner shape before product cooling<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Creating a so-called skirt for placing the product in a cooling oven<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Straightening a skirt with a stick<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Transferring thick-walled products to a cooling furnace for long-term cooling (1-2 days)<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div>

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Cooling on a belt furnace usually takes several hours, depending on the thickness of the wall and ice of the product.<\/p>\r\n <\/div>\r\n <\/div>\r\n<\/div> <\/div>\r\n\r\n \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Glass finishing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grinding, engraving, painting, and even decorating glass while it is still hot in the furnace are techniques that further refine the material, enhancing both its artistic and craftsmanship qualities. Franti\u0161ek frequently employs these decorating techniques. But how can we tell the different techniques apart?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Each mouth-blown shape has a so-called \"overpress\" above the mold \u2013 kopna, which needs to be cut off with a diamond blade after the product has cooled down and the vase needs to be sanded to its final shape.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Grinding involves several stages: rough grinding on surfaces, then on diamond wheels, and finishing on rubber wheels. This is followed by polishing on felt wheels using pumice and cerium.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Edge and ball grinding is performed on the surface of a horizontally mounted wheel, which produces a relatively flat surface. Ball grinding is done on the edge of a vertical wheel, creating a curved and often deeper surface. The entire process, for both edge and ball grinding, begins with so-called \u201croughing,\u201d during which all excess material is removed. This is followed by grinding and fine shaping, giving the piece its final form, and then polishing to a high shine. In the end, the finished piece meets the specifications of the technical drawing in terms of size, shape, and, most importantly, decoration.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Edge cut<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Honeycomb cutting<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Pearl cut \u2013 fine incisions<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Glass painting is considered one of the masterful techniques of glass refinement. Insects and other natural motifs are among the oldest themes depicted on glass. Franti\u0161ek expands on these motifs, aiming to lighten and modernize them. His paintings even reveal a scientific eye for nature\u2014his insects and flowers look as though they\u2019ve just been plucked from a meadow or landed on someone\u2019s nose. Each painted motif is created in several layers, which must be firedgradually in a painter\u2019s kiln. The work is therefore lengthy and demanding, requiring both precision and cleanliness.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Preparation of glass paint on glass plates<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Glass paint consists of a glass-forming base (silica, sodium, potassium, calcium), coloring metal oxides (e.g. iron for brown, chromium for green, cobalt for blue) and possible other ingredients (borax, lead oxide) that affect fusibility and properties. These powder paints are mixed with a carrier and turpentine to be applied to the glass, and then fired (600- 640\u00b0C) to diffuse the color centers into the glass surface, creating the final shade.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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For glass painting, high-quality synthetic brushes or brushes with natural hair, such as marten hair, are recommended, which are suitable for fine details and even paint application. The type of brush (flat, round) depends on the desired technique.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Finishing Touches<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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All finished pieces undergo a final quality inspection. Once they meet the strictest quality standards, each piece is hand-signed by the artist on the base. Additionally, a certificate of authenticity is provided with every glass piece.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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Trdlik collection of glass vase-object<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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A hand-signed Certificate of Authenticity of the work, which you will receive with each of the purchased products.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Frantisek Jungvirt Glass Studio\u200b Glass artist, designer and painter Franti\u0161ek Jungvirt has been working with glass since 2014. In 2024, he founded his own studio (FRANTI\u0160EK JUNGVIRT STUDIO S.R.O.), where he creates art objects, installations and limited-edition glass pieces. Franti\u0161ek Jungvirt Studio- butik, Naskove 1189\/1,…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-10096","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nAbout production - ENG Franti\u0161ek Jungvirt<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.frantisekjungvirt.com\/en\/about-production\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"About production - ENG Franti\u0161ek Jungvirt\" \/>\n<meta property=\"og:description\" content=\"Frantisek Jungvirt Glass Studio\u200b Glass artist, designer and painter Franti\u0161ek Jungvirt has been working with glass since 2014. 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