Technical information about Advertising banner printing
The banners used for printing are usually PVC banners. These are produced in different thicknesses and differentiated by gram weight per square meter.
Frontlit banners are produced at around 500g/m2, Blockout banners at 800g/m2, Backlit banners at 450g/m2 and mesh banners at 350g/m2. These figures can vary greatly depending on the quality and the manufacturer. More environmentally friendly, PVC-free materials have also found their way into the market and are also offered to the customer digitally printed. However, this material option is not heat-sealable because of the missing PVC contents and thus has to be sewn when hemmed.
Digital printing is carried out in roll widths of 100 cm to 500 cm depending on the printing machine and printing technique. Larger banners for covering building fronts or scaffolding are then, if necessary, combined from several webs into one large banner using high-frequency sealing technology. For this purpose, textile bands with additional textile holding loops are worked into the intermediate seams for fixation also within the large-scale area. The statics of large banners are an important criterion for the installation at the location of use. Large banners act like sails in wind and are therefore exposed to high tensile loads, which in extreme cases can lead to the destruction of the banner or the installation site (e.g. scaffolding).
As a counter measure, large format printing today no longer uses just one single material. Instead, the previously mentioned materials Blockout, Backlit and mesh are used. Especially the latter are recommended if the advertising banner is not completely attached to a stable background and is therefore exposed to a stronger wind load. The air-permeable mesh fabric is printed so that the small holes are not blocked. This requires precise high-performance printers.