Minimize the Heat Wave

ON HEAT TREATED GLASS

M I N I M I Z E T H E H E A T W A V E O N H E A T - T R E A T E D G L A S SVitrum TrueForm™ Tempered glass helps architects and building owners realize their design vision. With our full convection tempering furnace and computerized Osprey distortion monitoring system, Vitrum can measure and correct roll wave, pocket distortion and end-kink in real-time. This allows us to provide a premium tempered and heat strengthened glass product with nearly undetectable distortion levels and exceeds all ASTM, CGSB and GANA standards and meets the requirements set forth by major float glass suppliers.

H O W I T W O R K SAs the glass exits the tempering furnace a system mounted over the conveyor provides highly-precise digital measurements. The leading edge, central area and trailing edge of every lite of glass is measured. Roll wave peak-to-valley values are calculated for the entire surface area of the glass lite and are displayed to the operator in real-time and also stored in a database for later review and analysis. The operator immediately observes and removes product that fails to meet these tight tolerances, ensuring you receive glass that meets or exceeds our stringent TrueFormTM standards.• Every piece of glass is measured† • Entire surface of the glass is measured• Data is recorded and available upon request

W H A T I S R O L L D I S T O R T I O N ? Roll distortion is the periodic wave imparted to glass during heat-treatment. The viewer perceives the roll wave as optical distortion in the reflection or transmission of the finished window. These roll waves are always present at some level in heat-treated glass due to the glass being transported horizontally on ceramic rollers in the tempering furnace. However, by carefully controlling the heat and quench uniformity, the glass can exit the furnace with minimal roll distortion. The degree of the roll distortion that is present is measured by the industry in peak-to-valley and peak-to-peak distance.

W H A T I S A M I L L I D I O P T E R ? A diopter is a measure of lens power or curvature of a glass lens. This highly precise measurement is used by opticians to measure and correct vision problems. Tempering and heat strengthening inherently imparts curvature in glass. The extent of this inherent curvature is measured as lens power in millidiopters and is related to the radius of the curvature. Perfectly flat glass reflects a true image (0 md), while curved glass bends the reflected or transmitted light and the human eye sees distortion. The higher the millidiopter, the greater the curvature and the higher the visible distortion.

TrueForm Tempered Glass

Extraordinary glass for your next project

EXTR

AO

RD

INA

RY

GLA

SS

Industry Typical Tempered Glass < +/- 298 millidiopters of distortion with a roll-wave of .008

Typical Tempered Glass From Vitrum > +/- 145 millidiopters of distortion with a roll-wave of .004

Vitrum TrueForm™ Tempered Glass > +/- 120 millidiopters of distortion with a roll-wave of .003

†Certain shapes, unusual aspect ratios, and painted glass (screen or digitally printed, spandrel, etc.) may cause incorrect measurement readings and/or be unavailable in TrueForm. Glass with a low-e coating must be edge deleted prior to tempering, any variation from Vitrum’s standard edge deletion of 7/16" (11mm) will negatively impact the leading and trailing edge distortion.

C A P A B I L I T I E S Minimum : 12” x 24” 305mm x 610mm Maximum : 110” x 190” 2794mm x 4826mm Roll Wave (Horizontal): Maximum 0.003 Center / 0.008 Edges (Peak to Valley) Millidiopter: Maximum +/- 120 over 90% of Surface Measurement: Every lite measured, documentation available upon request Compliance : ASTM C1036, ASTM C1048 and CAN/CGSB-12-1-M90

I C O N I C A R C H I T E C T U R E D E S E R V E S T H E B E S TShown on this page are three pieces of tempered glass. Reflected in the glass is a photograph of the Brooklyn Bridge and New York City skyline. These three photographs represent the levels of reflection and distortion found when using highly-reflective tinted glass in an insulated glass unit. By specifying TrueForm™ tempered glass (above) for your next project, you can ensure your building will be as iconic as this landmark.

E X T R A O R D I N A R Y G L A S S E V E R Y T I M EVitrum produces TrueForm™ tempered glass to have a maximum of +/- 120 millidiopters of distortion over 90% of the glass surface. Upon request, Vitrum can provide detailed documentation of distortion levels for each lite of glass ordered, ensuring you receive extraordinary glass every time. Vitrum highly recommends TrueFormTM tempered glass for all monumental projects or when using moderately to highly reflective glass types. For more information or to order a full-size mock-up for your next project visit vitrum.ca or call us at 1.888.391.1166.

Head Office & Fabrication Facility9739 201 Street Langley, BC V1M 3E7 CanadaTel 604 882 3513Fax 604 882 3510TF 888 391 1166

Calgary Distribution Centre291230 Wagon Wheel RdRocky View County, ABT4A 0B2 CanadaTel 403 984 6573Fax 403 984 6576TF 888 391 1166

WWW.VITRUM.CA

©2017 Vitrum Glass Group. Vitrum and TrueForm is a registered trademark of Vitrum Holdings Ltd. Vitro, PPG, Guardian Glass, Saint-Gobain are registered trademarks of their respective owners. The glass colors and properties in this brochure are approximate and reflect the properties of the photographic processes. Capabilities, production offerings and performance values are subject to change without notice. Vitrum Glass Group strives to meet all of your glass fabrication needs, for sizes outside of these minimums and maximums please contact one of our highly knowledgeable Customer Services Representatives at 1.888.391.1166. For the most up to date information visit vitrum.ca.