About the banner
It is thе most used and the most inaccurately called material in Bulgaria. In the whole world it is called banner. Here it has taken the name of one of its ingredients: Poly banner Chloride or PVC. The other ingredient of banner is a polyester fabric – it is the base on which the PCV is placed. The "size" of banner depends on the knitting and the size of the hole in the fabric: 9x9, 12x18, 9x12. These are the holes (squares) in one sq inch – as bigger is the value, as stronger is the banner. Another determinative for the strength measure is D-tex: -The number of the windings of the string in one linear meter – they vary from 450 to 2500 and they can have different values in length and width of material. The material’s weight is very important. It can vary from 150 to 1200gr per sqm. As heavier is it, as more material is used in it and it is respectively stronger then. The main difference in the structure and quality of the banner is due to the manner of PVC placement over the polyester fabric. The laminated banner is produced in next manner - two layers of PVC film are placed by heating and pressure on the both sides of the fabric. This process is called laminating. This manner is cheaper for banner to be produced, but there is a risk of ungluing of the layers and from this, undesired effects to be led during the use of the banner. Besides this, the film becomes harder and not elastic. In case of low temperature the banner "breaks". The price is the determining reason for the choice of this kind of banner. The process of production of coated banner is next: the fabric goes through some tanks full with some "pulp"- it is liquid PVC with plastifiers and after that the fabric dries. The process is done many times and it is possible to put a last, final layer in order to receive a better ink adhesion during the printing. The banner which is made in this case is soft, flexible and suitable for very important products – truck awnings, advertising instructions for long use, and it is suitable for use in temperatures beneath zero. The banner can be divided into two parts-laminated and coated or cheap and expensive. The decision of which material to use depends on the purpose of the final product and the wanted price.
Banner set (Mesh) is another, similar product. It is made like the coated banner: the polyester fabric which is coated has very large holes. In this case the "pulp" cannot fill in the fabric and there remain holes. Thus the main task of the mesh is formed - to let the air pass.

About the SAV
The self-sticking PVC film (SAV-Self Adhesive banner)
It is used on a mass scale printing material.
Depending on the manner of produce, there are several types of SAV. The monomer (calandrated) SAV is extruded PVC which goes through a system of shafts which pull it to the needed width and thickness, and after that the SAV is trimmed and folded in rolls.
The monomer SAV is cheap for producing but difficult for application on rough surfaces. It is used for large, flat surfaces and it is can be translucent – to let the light pass – for illuminated constructions. In the same manner is made the polymer SAV– plastifiers (polymers) are added in the material prepared for extrusion. Even after the calandration the SAV remains soft and flexible. It is suitable for sticking of lightly curved surfaces- for example- vehicles. To produce the
cast SAV (Cast) it is necessary to pour PVC with more plastifiers in tanks where it dries till the needed thickness. In this way a film with very low level of tense is made – it becomes flexible, elastic and soft. This kind of SAV is suitable for application on curved surfaces. In order to get a better elasticity, during the time of application the SAV is heated by hot air. After the assembling the SAV is heated again to keep its form for long time.
All the described technologies give the so called SAV - PVC material folded on a roller with different width and thickness. After that there is a process of spreading of the glue layer - it is very important for the quality of the final product. This layer could be constant or current-for the needs of short-term companies when it is necessary to remove the posters. The self-sticking SAV cannot stick itself - you need some skills and ability to put it on!

Large-format printing
Large-format printing is called a process of reproduction of images with width more than 1,5m. Basically, the large-format printers are subdivided into two types depending on the used types of ink-based on water or solvent. Since several years some UV-fixing inks are presented on the market, too. Those which are based on water give a possibility to print images with high resolution, but with low resistance to atmospheric conditions. They are used especially for internal arrangement and decoration. The UV inks are polymers which fix themselves (polymerize) after illumination with UV light, generated by lamps and for a short time from diodes. They concede a very good quality of printing and are used especially in cases of printing on flatness – the so called flatbed printers. There are roll-to-roll printers which use UV technology, but the flexibility and the resistance of the inks on some media are still an object of development.
In our base we have counted on another type of large-format printers-the solvent type. The solvent (acid) inks are devoted to print outside adverts o different media, and their distinctive characteristic is their firmness to atmospheric conditions �esp. humidity, water, and ultraviolet radiation. The advantage of the solvent inks is that you can print with them on not specialized "cheap" media without special coating or without necessary laminating (preservation by a transparent film) of the image. All the large-format printers use printing heads. Nevertheless the market relies on several main producers of printing heads: XAAR, Toshiba, Spectra, Seiko, Konika-Minolta, Epson. The quality of the print depends on the number and the type of heads. Each head has different number of throttles and from where the ink discharges on the media. The process is complicated and it is commanded by a bottom plate in each printer. Another important moment is the used ink. You can predict that the cheaper one, the worse quality is its. The problems are connected with the fading of some or all the colours, and with often blocking of the throttles which results over the printing quality. We have solved the problem using only the recommended by the manufacturer inks. Thus we give a guarantee for the stediness of the colours minimum for 2 years without preserving by a UV protective film.