No_3_March_1969 — Page 18

Spectrafloat New Heat Rejecting Glass

To the architect and designer Pilkington Spectrafloat may well prove to be the most important glass development of the post-war years. The Pilkington development of Float glass revolutionized glassmaking. Now, Spectrafloat, a development of the Float process, provides the beginning of a major change in window design.

It is a glass which reduces the transmission of solar heat. It is a glass which cuts down sky and ground- reflected glare. It has a subtle colour effect. Like Float, it has a permanent fire-finished surface.

In air-conditioned buildings it will reduce both the capital and running costs of the air-conditioning plant. In buildings without air-conditioning, Spectrafloat will make a real contrib- ution to environment.

The Greatest Advance in Glassmaking since Pilkington invented Float

Properties: Pilkington intend to market eventually a range of Spectrafloat glasses, with different transmission characteristics and colours. Initially one glass is being made: Spectrafloat 50/67 (Bronze) -50% light and 67% total solar heat transmission. Light: As the above figures show, Spectrafloat will reduce the amount of natural light reaching the interior of a building, but not as significantly as the figures might appear to indicate. Thus, assuming ordinary clear Float glass provides natural illumination in a room up to 20 ft from the window, the use of Spectrafloat 50/67 only reduces this distance to 16 ft. There will, of course, be a need to pay special attention to the design of artificial lighting.

Glare: Spectrafloat will temper sky glare and ground-reflected glare,

Pilkington Agent: Shewan Tomes (Equipment) Ltd.,

giving more comfortable internal visual conditions. Like any transparent glass, it will not combat direct glare from the sun.

View: Perception of the view is little affected. The eye quickly adapts to the colour of the glass.

Double Glazing and Toughening: If advice is needed on any processing, including Double Glazing and Toughen- ing, your Pilkington representative should be consulted.

For further information:

If you have a project where you might consider the use of Spectrafloat, the Pilkington Technical Advisory Service is equipped to give the specialist advice necessary, and can be consulted through the Pilkington agent who will also supply technical literature and show you

PILKINGTON samples on request. GLASS

G.P.O. Box 15513, 10th Floor, Universal House, 151 Des Voeux Road, Central, Hong Kong.

16

Far East BUILDER, March 1969