Advertise with correx posters.

Street posters is an effective means of communication for the purpose of commercial advetising such as

  • event notifications
  • auctions
  • estate agent boards
  • for sale signs
  • college- or school registration information posters
  • or just plain advertising of a product or a business.

Correx board is more durable than paper or card-board and has become a well known street advertising medium in perhaps all of our cities.halftone print

Correx board is a twin walled extruded polypropylene material with flutes. It could be described as a "plastic cardboard" and it is widely used for street posters. It is treated to make it ink receptive and represents a very low cost option for both indoor and short term outdoor signs. (Outdoor durability in South African conditions for correx board is approximately 2 years before it starts becoming brittle from direct sunlight)

correx exampleIt is one of the lightest substrates available (Approximately 220 grams per A1 board), and is water-resistant.

It has applications in signage, packaging, printing, advertising, point of sale, storage, transport and general industrial areas.

Information is normally silk screen printed onto the correx board with a specially prepared solvent ink but can also be applied in the following ways:

  • self adhesive vinyl information prepared as a cut-out and applied onto the correx boards or
  • digitally printed vinyl that is applied as a layer covering the complete correx board (like a large sticker)

Although full colour work can be digitally printed at high resolution onto vinyl and then applied to correx, this process is comparitely much more expensive than screen printing directly onto correx board. Although the print resolution is much lower with screen printing the final result is suitable in most circumstances. Street posters are viewed at a distance where the resolution does not make that much difference.


Prices of printed Correx board signs

We only supply printed correx boards and prices for some of the more common correx sizes can be viewed in the documents attached at the bottom of the article on Correx printing prices


More examples of actual printing and layouts that were used on correx boards:

Some were printed on A2 and some on A1 but the pictures were all made the same size for better viewing.  A lightbox viewer was implemented to see the pictures close up.


Correx Board Colours

Correx boards are available from signage suppliers in South Africa, mainly in white and two variations of yellow. (Bright yellow and Golden Yellow)Other colours such as Black, Red, Blue, Green and Gray are available from certain suppliers, but not as readily from signage material distributors.

Correx board thicknesses

Correx boards are available in sizes:

  • 2mm
  • 3mm
  • 3,5mm
  • 4mm and
  • 5mm

but not from all distributors or in all colours.

The most commonly used thickness for printing correx board posters is the 3mm option when using A1 sized boards or smaller but a 3.5mm thick board provides a more sturdy option and is useful in certain circumstances especially in windy conditions. Thicknesses greater than 3.5mm is not commonly used for street posters.

In recent years, some manufacturers of correx boards have made a variation where the flutes of the material are not straight but in the form of a wave. These correx boards are commonly referred to as “S-correx” and provides a less flexible board that is more advantageous for street posters than straight flute correx boards.

Correx board sizes

Correx board manufacturing sizes vary and although the material is easily resized, it is most economical for printing purposes to use material in the sizes supplied from the factory.

In South Africa the most commonly used Estate Agent type poster size is 600mm x 400mm that is approximately and A2 size.

Following are the most commonly available factory sizes (varying from distributor to distributor)

  • 2500mm x 1250mm
  • 1830mm x 1220mm
  • 1530mm x 1020mm
  • 841mm x 594mm (A1)
  • 800mm x 600mm
  • 750mm x 500mm
  • 600mm x 450mm
  • 600mm x 400mm
  • 594mm x 420mm (A2)
  • 510mm x 340mm

Print sizes

Although correx boards are available in the sizes mentioned above, print sizes are restricted by machine size.
We are able to print to a maximum of A0 size (841 x 1189 mm) in-house. 

Printing Colours

Full colour printing examples

Special inks have been developed to adhere to the plastic of Correx boards. Colours that are available vary between suppliers and normally include a range of spot colours and the four Process colours: Cyan, Magenta, Yellow and Black.

Process colour inks that are used for full colour printing differ from spot colour inks in various ways.  It is visibly different in composition from the spot colour inks and are closer in viscosity to a paste than a liquid.   Full colour inks are more transparent and full colour printing is required to "bleed" less in order to obtain a crisp printing finish than what is normally common with screen printing.


See our standard Spot Colour chart for screenprinting.


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Adhering to municipal regulation on Outdoor Advertising in South Africa

When you decide to advertise on any outdoor medium including street posters, it is wise to consider the regulations imposed by your local municipality. Since we are situated in Centurion that falls within the Tshwane Metropolitan area the regulation as referenced in the article on this website is used as an example of the type of rules that apply to the use of street posters.

Prices of printed Correx board signs

As mentioned towards the top of this page, the prices for some of the more common correx sizes can be viewed in the documents attached at the bottom of the article on Screenprinting prices.