EN
The article discusses basic tests carried out on the sample taken from the Panorama in order to design a fabric for patching up mechanical or physical damages to the canvas. The testing method as well as the principle parametres which resulted are presented: weave, mass1, filling of the fabric, linear density, incorporation, the kind of warp and weft (thickness and strand) and the material Used. Also the testing of the reproduced fabric is discussed in detail and the aforementioned parametres are supplemented wiith those of Strength, change of dimension when wet, hygrosoopicity, the angle of crease. It should be mentioned that the research proved that the panorama fabric must meet specific requirements, different from those applied to ordinary fabrics or even to specially designed painting canvases but meant for smaller pictures.. It is so because fabrics used for really large pictures must withstand specific tensions one at variance with another, longitudinal tension produced by the upper suspension and the weighted bottom, and transverse — resulting from the segments being joined crosswise (this causes very strong transverse tensions in a fabric). Resistance to transverse tensions was obtained by using a weft of a particularly strong yarn made of four stranded threads and a warp of a single yarn which was then interwoven in two threads; thus an appropriate density and an even surface of the fabric were achieved. Furthermore the article discusses the parametres and the principles of selection of reinforcing fabric, the fabric used to reinforce the upper parts of the segments (the places of suspension) as well as other textile materials used during conservation such as threads for the patch up, an unwoven fabric (’’fizelina”) for the reinforcement of the seams.