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Processes Promotional Video

The video below touches upon the processes that PWG use to provide industry leading quality.

If you have any queries about the processes and whether they can be adapted to suit your specific needs then please contact us and we’ll be happy to help.

We have a range of manufacturing processes and keep up to date with new developments. With dedicated machinery for every type of sign making task we are best positioned to meet the requirements of any customer. Various materials are used and they each have distinct characteristics that define their use.

Plastics W Graham Ltd. 114 Cowgate, Dundee, Scotland DD1 2JU   |   Call:  +44 (0) 01382 223 734   |   Fax:  +44 (0) 01382 201 799   |   sales@pwgsigns.com


A computerised image is machined onto the material, to create letters words and images at a suitable depth for reading. Normally the materials is multi-layered and engraving reveals the colour underneath the surface. . . . . .

Vinyl Lettering

Pre spaced letters and designs from thin self adhesive PVC film. The waste film is removed from around the letters then a transfer mask is applied. The mask, is then applied to sign backing material.Multiple colours can be applied. . . . . .

Silk Screen Printing

Involves the creation of a mask set on a fine screen mesh tensioned like a drum. The mesh is placed on top of the materials to take the print then liquid ink is spread over and through the mesh with a “squeegee” transferring the ink . . . . .


This method uses the same principles as silk screening except the lettering is the only area not printed onto the metal. The printed area is actually a resist so that when acid is applied to the metal, it eats into the metal forming letters shapes . . .

Digital Sign Printing

This modern method converts a digital image directly to print full colour directly onto the substrate. This can be self adhesive vinyl or solid material. The Process is completed by a number of passes over the material. . . .

Thermal Printing

Either a table top or hand held machine that prints labels or small signs. Dry ink is fused onto self adhesive vinyl to form letters and graphics. Can be operated in an office environment. Suitable for in-house manufacturing. . . .


Stainless Steel -  an extra strong alloy, resistant to rusting or corroding. Ideal for crafting a durable sign or control panel or label. Suitable for engraving and etching

Brass - a durable alloy used for mainly for decorative signs and plaques. Suitable for engraving and etching.

Self adhesive Vinyl - a thin PVC sheet that is easy to apply to a smooth non porous surface. Suitable for surface labelling.

Rigid engraving laminate - a hard wearing Material that can be screwed, glued or taped to suitable surface.

Flexible engraving laminate - for light weight use that can be screwed, glues or taped to a suitable surface.

Foam PVC - a lighter weight and thicker material which gives more rigidity to the sign.

Polycarbonate - a strong plastic. Polycarbonate signs are virtually unbreakable and if anti-graffiti film is applied then it becomes vandal resistant.

Aluminium - signs are tough and long lasting. They are particularly used for road signs.

Aluminium composite - a  polyethylene core  sheet sandwiched between two aluminium surface layers. Lighter weight than aluminium and lower cost substitute for aluminium.

Photo Luminescent - a sheet material that lights up in the dark and can be made into a label or a sign.

Fibre Glass -  a vandal resistant material that allows the message to be encapsulated inside.

Illuminated - illuminated signs are framed and internally illuminated. Requiring a power source. Self illuminating signs and internally battery operated signs are available.