DICTIONARY

ANNEALING
Subjecting glass to controlled cooling in order to remove stresses from the glass so that it can be cut or worked without breaking.
ARRISED

Descriptive of the edge of a surface that has a bevel of width not exceeding 1.6mm at angle of approximately 45º to the surface.

AUTOCLAVING

Final process of heating and pressurising conventional PVB laminated glass.

AUTOMOTIVE GLASS

Toughened Glass – used for side and rear windows in all types of vehicles.
Laminated Glass – used for windscreens in all types of vehicles.
Beadings/Mouldings – Exterior finishers to fill the gap between windscreens and aperture.
Braided Wire – Same as piano wire but braided in texture for extra cutting strength.
Butyl Tape (Kit) – Adhesive used for certain vehicles to bond the windscreen to the vehicle.
Cab Slider – Rear slider for LDV’s and canopies.
Ceramic Fritt – Black border around the perimeter of certain windscreens to obscure adhesives.
Door Glass – Toughened glass for all types of vehicles.
Door Glass – Tab Plastic adapter affixed to a door glass and then connected to the window mechanism.
Encapsulated – Glass Rubber or plastic moulding encapsulating rear vent or quarter.
Fixed Light – Fixed glass in a sliding window.
Front Vent – Glass, triangular in shape and situated on the front door.
Hotline – The demister on a rear light.
Mirror Boss/Button – Adapter for a rear light.
Mirror Boss / Button – Adapter for a rear view mirror affixed to the windscreen.
Piano Wire – Wire used for cutting out windscreen.
Polyurethane Adhesive – Adhesive used for bonding windscreens to vehicles.
Primer – Chemical solvent applied to aperture and windscreen to improve adhesion of polyurethane glass and metal.
Quarter – Glass which is usually fixed, positioned adjacent to the back door.
Rear light – Rear windscreen.
Rear Vent – Glass, triangular in shape and situated on the rear door.
Shade Band – Blue, green or grey tinted strip on the top side of a windscreen.
Side Light – Fixed side glass.
Slider – Sliding glass in frame.
Windscreen Clips – Clips used around the windscreen to assist fitment of beadings/mouldings.

BENDING
Subjecting glass to a process of bending under heat at varying degrees depending on the thickness.
BEVELLING
Edging of lazing material to finish at an angle to the face of the material.
BULLET-RESISTANT GLASS
Varies in composition and thickness to meet anticipated level of attack. In case of laminated materials, the number of layers is determined by the mass of the bullet.
CAST GLASS
300 year old method of casting glass on a table and by subsequent grinding (12.5% on each side) achieving a plate glass finish. Casting is still in use in the production of “Georgian Wire Cast”.
CELLULAR GLASS
Also know as “foamed” glass. Pure glass is foamed, then cooled in controlled conditions, producing a lightweight, rigid material composed of millions of completely sealed glass cells. There is a wide range of products, slabs, boards, panels, pipe covers, etc with applications in construction and industry.
CLEAR GLASS
Raw, transparent glass in sheet form, drawn or float.
COATED GLASS
Glass used for drinking type glasses, vases, carafes, vessels, etc.
CURVED GLASS
Toughened glass which has been manufactured to a predetermined curvature using a mould in a furnace at varying degrees of heat up to 700º.
CUTTING
Glass is cut by scoring and subsequent application of tension to the scored surface to open and separate the glass pieces from the stock sheet.
DOUBLE GLAZING
Glazing that for the purpose of sound insulation or thermal insulation or fire protection, utilises two panels of glass, separated by substantially stationery air or inert gas.
DRAWN SHEET
Sheet glass is transparent glass that is produced by the vertical drawn process giving natural fire-finished surfaces. Due to the method of production, some degree of line distortion is inevitable.
DRIFTWOOD
Brand name for patterned, obscure glass.
DRILLING
Abrasive diamond drilling of a hole in the glass sheet.
EDGING
Subjecting sharp, cut glass edge to diamond abrasive grinding and then rubber compound wheel for smooth, safe edge.
FINISHING
Grinding and polishing of glass sheet edge.
FIRE-RESISTANT GLASS
Boro-silicate and calcium-silicate glass are fire resistant and are not wired or laminated. When used in appropriate framing, fire ratings of up to two hours can be obtained.
FLOAT GLASS
Transparent glass that is manufactured by allowing the glass from the tank furnace to flow across molten metal (usually tin). The surface of the glass is flat and parallel so that the glass provides undistorted vision and reflection.
GLASS BLOWING

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GLASS BRICKS
Forming of molten glass into a container or vessel, perfected in Venetian Glass such as Chandeliers, etc.
GLASS FLOORS
The bricks are manufactured by a pressing process in the form of two shallow dishes that are subsequently fused together to form a hollow hermetically sealed brick.
HEAT ABSORBING GLASS
Glass that resists the passage of radiant heat by absorption.
HEAT REFLECTING GLASS
Glass that reflects a portion of radiant heat due to its metallic coating.
HEAT RESISTING GLASS
Glass that, because of its low co-efficient of linear expansion, or because it has been toughened, withstands severe thermal shock and high temperature conditions over an extended period without adverse effects.
HI
Hi impact (laminated glass).
HPR
High Penetration Resistant (Laminated Glass)
INCLUSION
The collective name of manufacturing defaults in the production of raw glass, such as Stone/Pit marks, bubbles, indentations, etc.
LAMINATED GLASS

Ordinary Laminated Glass – Glazing pane that comprises two sheets of glass bonded by a shear-resistant and impact-resistant inter-layer. When laminated glass is fractured, the glass pieces adhere to the inter-layer and their sharp cutting edges are held in contact with one another and are thus prevented from causing lacerations.
Multi-Laminated Glass – Similar to ordinary laminated glass but consisting of three or more sheets of glass bonded by a series of inter-layers. It provides greater security than does ordinary laminated glass and therefore greater security than does ordinary laminated glass.
Bullet-Resistant Glass – A purpose made multi-laminated glass designed to the precise specifications of the purchaser.
Safety and Security Laminated Glass (also safety mirrors) – Laminated glazing pane available with inter-layers and different combinations of glass types and thickness’, depending upon the performance required.
Functional Laminated Glass – Glazing pane intended for the control of aspects such as transmitted solar radiation, sound, glare reduction, etc.

LEAD GLASS

Contains a large percentage of lead oxide which imparts a high degree of opacity to x-rays. Available in blocks of thickness up to 150mm, depending on the radiation shielding required.

LOW-E GLASS
Low Emissivity glass, a metallically coated glass that provides selective transmission of radiation to increase insulation values.
MULTIPLE GLAZING
Glazing based on the same principle as double glazing, but incorporating 3 or more phases.
NS
Normal strength (Laminated Glass).
PACIFIC
Brand name for patterned obscure glass.
PATTERNED or OBSCURE GLASS
Covers a large range of translucent and tinted, textured glass, supplied in several thicknesses and sizes, depending on the country of origin.
PVB
Poly-Vinyl-Butyral. A plastic inter-layer in laminated glass.
RECYCLED GLASS
Glass is the ideal product for recycling since it can be re-melted indefinitely without impairment of its quality. During the recycling process many impurities have to be removed from the glass. Pure recycled glass is called cullet.
REFLECTIVE GLASS
Metallic, thin film sputtered onto glass face.
ROLLED GLASS
Molten glass passed through rollers in order to impart pattern.
SAFETY GLASS
Glazing material that is constructed, combined or treated with the i8ntention of minimising the likelihood of breakage caused by human impact and resulting in injuries in the form of cuts or punctures.
SAND BLASTING
Refers to a white opaqueness on the glass. Patterns can be sandblasted onto the glass face.
SHADED GLASS
Transparent, shaded glass in grey, bronze, green, etc.
SILK SCREENING
Ink printing on the glass face.
SILVERING
A process by which a metal film (silver, gold, copper) is deposited on glass and the film then covered or coated with a protective medium such as in the manufacture of a mirror.
STAINED GLASS
Coloured, obscure glass used in lead lights and artwork in windows, lampshades. etc.
STENCILLING
Printing on glass such as logo or similar.
STIPPOLYTE
Brand name for patterned, obscure glass.
TECHNICAL GLASS
Fibre glass wool, cellular glass, etc.
TEMPERING
Hardening/toughening of glass in a furnace.
TEMPLATE
The shape of glass required. Made from a suitable material i.e. Masonite, aluminium, steel, cardboard, or any other firm material which will not easily bend or crumple.
TINTED GLASS
Transparent, shaded glass in grey, bronze, green etc.
TOUCHED CORNERS
Corners of glass polished or arrised down to remove sharp edges.
TOUGHENED GLASS

The glass is produced by subjecting annealed glass to a process of controlled heating and cooling which produces high compression in the surface and compensating tension in the centre. For this reason, toughened glass cannot be cut, drilled, surface worked or edge worked. The process gives the glass greatly increased resistance to impact, loading and thermal shock. When toughened glass breaks it is reduced to comparatively small harmless pieces. Toughened glass is five times stronger and more flexible than ordinary glass.

TRADE MARK
Manufacturer’s or customer’s own logo, screen printed onto glass pane.
WASHING
Thorough cleaning and drying of glass to prevent staining after edging.
WIRED GLASS

Annealed glass containing a wire-mesh that is completely embedded in the body of the glass during manufacturing. Wired glass is manufactured in both clear and obscure form.

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FGW Safety Glass – Automotive Glass, Motor Glass, Windscreen, Windshield, Distribution and Fitment.