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Blown Glass
Glassblowing is a glassforming technique that involves inflating molten glass into a bubble (or parison) with the aid of a blowpipe (or blow tube). A person who blows glass is called a ''glassblower'', ''glassmith'', or ''gaffer''. A '' lampworker'' (often also called a glassblower or glassworker) manipulates glass with the use of a torch on a smaller scale, such as in producing precision laboratory glassware out of borosilicate glass. Technology Principles As a novel glass forming technique created in the middle of the 1st century BC, glassblowing exploited a working property of glass that was previously unknown to glassworkers; inflation, which is the expansion of a molten blob of glass by introducing a small amount of air into it. That is based on the liquid structure of glass where the atoms are held together by strong chemical bonds in a disordered and random network,Frank, S 1982. Glass and Archaeology. Academic Press: London. Freestone, I. (1991). "Looking into Glass". I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass Bubble
Glass is an amorphous ( non-crystalline) solid. Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics. Some common objects made of glass are named after the material, e.g., a "glass" for drinking, "glasses" for vision correction, and a "magnifying glass". Glass is most often formed by rapid cooling (quenching) of the molten form. Some glasses such as volcanic glass are naturally occurring, and obsidian has been used to make arrowheads and knives since the Stone Age. Archaeological evidence suggests glassmaking dates back to at least 3600 BC in Mesopotamia, Egypt, or Syria. The earliest known glass objects were beads, perhaps created accidentally during metalworking or the production of faience, which is a form of pottery using lead glazes. Due to its ease of formability into any shape, glass has been traditionally used for vessels, such as bowls, vases, bottles, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cane Foglio - David Patchen
Cane or caning may refer to: *Walking stick, or walking cane, a device used primarily to aid walking *Assistive cane, a walking stick used as a mobility aid for better balance *White cane, a mobility or safety device used by blind or visually impaired people * An implement used in caning, a form of corporal punishment * Sugarcane * Cane (surname) Plants *Cane (grass), tall perennial grasses with woody stalks **''Arundo'', Old World canes **''Arundinaria'', New World canes **''Arundo donax'', giant cane **'' Arundinaria appalachiana'', hill cane * Cane (vine), the part of a grapevine that supports the new growth * Cane ash, the white ash tree, ''Fraxinus americana'' * Cane cholla, ''Cylindropuntia imbricata'', a cactus Animals *Cane beetle, ''Dermolepida albohirtum'', a pest of sugarcane, native to Australia *Cane Corso, an Italian Mastiff * Cane mouse, ''Zygodontomys'', a rodent from Central and South America *Cane rat, ''Thryonomys'', a large rodent native to Africa * Cane sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laboratory Glassware
Laboratory glassware is a variety of equipment used in science, scientific work, traditionally made of glass. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes. It is commonly used in chemistry, biology, and analytical laboratory, laboratories. Many laboratories have training programs to demonstrate how glassware is used and to alert first–time users to the Laboratory safety#Safety hazards, safety hazards involved with using glassware. History Ancient era The history of glassware dates back to the Phoenicians who fused obsidian together in campfires, making the first glassware. Glassware evolved as other ancient civilizations including the Syrians, Egyptians, and Romans refined the art of glassmaking. Mary the Jewess, an alchemist in Alexandria during the 1st century AD, is credited for the creation of some of the first glassware for chemical such as the ''kerotakis'' which was used for the collection of fumes from a heated material. Despite thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bellows
A bellows or pair of bellows is a device constructed to furnish a strong blast of air. The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtight cavity which can be expanded and contracted by operating the handles, and fitted with a valve allowing air to fill the cavity when expanded, and with a tube through which the air is forced out in a stream when the cavity is compressed. It has many applications, in particular blowing on a fire to supply it with air. The term "bellows" is used by extension for a flexible bag whose volume can be changed by compression or expansion, but not used to deliver air. For example, the light-tight (but not airtight) bag allowing the distance between the lens and film of a folding photographic camera to be varied is called a bellows. Etymology "Bellows" is only used in plural. The Old English name for "bellows" was , 'blast-bag', 'blowing-ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murrine
Murrine (singular: murrina) are colored patterns or images made in a glass cane that are revealed when the cane is cut into thin cross-sections. Murrine can be made in infinite designs from simple circular or square patterns to complex detailed designs to even portraits of people. One familiar style is the flower or star shape which, when used together in large numbers from a number of different canes, is called millefiori. Murrine production first appeared in the Middle East more than 4,000 years ago and was revived by Venetian glassmakers on Murano in the early 16th century.Carl I. Gable, ''Murano Magic: Complete Guide to Venetian Glass, its History and Artists'' (Schiffer, 2004), p. 37. . Once murrine have been made, they can be incorporated into a glass vessel or sculpture in several ways. A number of murrine may be scattered, more or less randomly, on a marver (steel table) and then picked up on the surface of a partially-blown glass bubble. Further blowing, heating, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caneworking
In glassblowing, cane refers to rods of glass with color; these rods can be simple, containing a single color, or they can be complex and contain strands of one or several colors in pattern. Caneworking refers to the process of making cane, and also to the use of pieces of cane, lengthwise, in the blowing process to add intricate, often spiral, patterns and stripes to vessels or other blown glass objects. Cane is also used to make murrine (singular ''murrina'', sometimes called mosaic glass), thin discs cut from the cane in cross-section that are also added to blown or hot-worked objects. A particular form of murrine glasswork is millefiori ("thousand flowers"), in which many murrine with a flower-like or star-shaped cross-section are included in a blown glass piece. Caneworking is an ancient technique, first invented in southern Italy in the second half of the third century BC, and elaborately developed centuries later on the Italian island of Murano. Making cane There are sev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frit
A frit is a ceramic composition that has been fused, quenched, and granulated. Frits form an important part of the batches used in compounding enamels and ceramic glazes; the purpose of this pre-fusion is to render any soluble and/or toxic components insoluble by causing them to combine with silica and other added oxides.''Dictionary of Ceramics'' (3rd Edition) Edited by Dodd, A. Murfin, D. Institute of Materials. 1994. However, not all glass that is fused and quenched in water is frit, as this method of cooling down very hot glass is also widely used in glass manufacture. According to the '' OED'', the origin of the word "frit" dates back to 1662 and is "a calcinated mixture of sand and fluxes ready to be melted in a crucible to make glass". Nowadays, the unheated raw materials of glass making are more commonly called "glass batch". In antiquity, frit could be crushed to make pigments or shaped to create objects. It may also have served as an intermediate material in the manu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graphite
Graphite () is a Crystallinity, crystalline allotrope (form) of the element carbon. It consists of many stacked Layered materials, layers of graphene, typically in excess of hundreds of layers. Graphite occurs naturally and is the most stable form of carbon under standard conditions. Synthetic and natural graphite are consumed on a large scale (1.3million metric tons per year in 2022) for uses in many critical industries including refractories (50%), lithium-ion batteries (18%), foundries (10%), and lubricants (5%), among others (17%). Graphite converts to diamond under extremely high pressure and temperature. Graphite's low cost, thermal and chemical inertness and characteristic conductivity of heat and electricity finds numerous applications in high energy and high temperature processes. Types and varieties Graphite can occur naturally or be produced synthetically. Natural graphite is obtained from naturally occurring geologic deposits and synthetic graphite is produced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honey Dipper
A honey dipper (also called a honey dripper, honey wand, honey stick, honey spoon, or honey drizzler) is a kitchen utensil used to collect viscous liquid (generally honey or syrup) from a container, which is then dispensed at another location. Description The tool is often made of Woodturning, turned wood. Besides the handle, the tool consists of equally spaced grooves. Often, the grooves descend in circumference on each new groove. The utensil is sometimes made of plastic, stainless steel, silver-plated brass, silicone, ceramic, or glass. Some users prefer wood or another soft material, which is less likely to chip a glass or porcelain cup. Use One method of using the tool is to dip the grooved end into the liquid, rotate the handle into a horizontal position, then slowly twirl the handle between the thumb and fingers while in transport, as the concentric grooves help to minimize dripping. When the twirling motion is stopped, the honey will collect on the lower parts of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marver
A marver is a tool used in glassblowing. It generally is made of a polished steel, brass, or graphite surface attached to a metal or wooden table. For fine applications such as lampworking, a smaller hand-held implement may instead be used. As a tool, marvers date back to glassblowing techniques of the Roman Empire and were made of marble. Warm glass is rolled on the marver, both to shape it and as a means of temperature control. With a high specific heat capacity, the surface absorbs heat from the glass; because of the relatively slow flow of heat through the glass, it does so particularly from the outermost material, forming a more viscous skin. Because the glass comes in direct contact with the marver, it must be kept exceptionally clean in order to prevent points of poor conduction or the transfer of debris into glass worked upon it. Metallic marvers are generally rubbed with steel wool and then wiped with rubbing alcohol Rubbing alcohol, known as surgical spirit in the Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Stress
In mechanics and thermodynamics, thermal stress is mechanical stress created by any change in temperature Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measurement, measured with a thermometer. It reflects the average kinetic energy of the vibrating and colliding atoms making ... of a material. These stresses can lead to fracturing or plastic deformation depending on the other variables of heating, which include material types and constraints. Temperature gradients, thermal expansion or contraction and thermal shocks are things that can lead to thermal stress. This type of stress is highly dependent on the thermal expansion coefficient which varies from material to material. In general, the greater the temperature change, the higher the level of stress that can occur. Thermal shock can result from a rapid change in temperature, resulting in cracking or shattering. Temperature gradients When a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
