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General Information

Glossary

Acrylic

A superior plastic. Can be moulded, cast, extruded and flame polished. Clear version is 'crystal' clear. Perspex is ICI's trade name for acrylic. Available in two grades - standard and the much stronger High Impact.

Diamond Polishing

Machine polishing using diamond cutters to create a sharper finish than flame polishing. However, can only be used for square edges. Quicker than flame polishing as machine process rather than by hand.

Fabrication

Cutting, bending and hand assembling.

Flame Polishing

Literally heating the edge of the acrylic which melts sufficiently to give a sheen or polish. Styrene does not respond in the same way and therefore cannot be flame polished.

Heat Bending

Making a fold or bend in one direction by laying the plastic over a hot wire element and almost melting it so it can be bent.

Injection Moulded

Plastic is liquefied and forced (injected) into a mould. The mould is usually made of metal, highly engineered and expensive and therefore not suitable for small production runs.

PETG

A similar Material to acrylic but cannot be fl ame polished or cemented, offers higher impact resistance.

Polycarbonate

Looks similar to acrylic but much stronger and is difficult to bend and mould.

PVC

A very flexible plastic which should not break or shatter but has little rigidity. Clear PVC is not as crystal clear as styrene or acrylic.

Styrene

A plastic product which has more rigidity than PVC and is less brittle than acrylic. Like PVC its edges cannot be flame polished.

Vacuum Forming

Plastic is heated and allowed to almost melt over a 'form' of metal or wood to take its shape. A less exacting process, less expensive, therefore more suitable for smaller runs.

Dimensions

The 'A' Paper sizes

Dimensions

Metric Conversion Chart

Metric Sizes