Whether fabric or synthetic leather - covers have to be able to withstand abrasive movements and weight loads as well as heat, light and dirt without showing the strain. The fabrics that SYMPHONIC uses are subject to strict quality criteria. As a subsidiary of premium manufacturer ADA, quality assurance comes first. In the quality test, the upholstery fabrics are subjected to the Martindale abrasion test, which provides information about their durability. Further criteria are the so-called pilling, the formation of pebbles, and the light and rubbing fastness of the material.
The Martindale abrasion tester simulates the daily wear and tear of covers. The material to be tested is rubbed against a standard material made of wool, depending on the use, given a certain weight load. This results in a wear number, from which point the fabric begins to wear out. As soon as two threads wear out. The test is aborted and the abrasion cycles are counted. The higher the number of tours, the more resistant the fabric. For private use, at least 10,000 abrasion cycles should be achieved with low consumption, and 15,000 for everyday use. In order to be able to withstand the heavy use in a public environment, it should be 20,000 to 30,000 rubs. The following applies: synthetic fibers are usually more abrasion-resistant than natural fibers and polyamides have the highest resistance.
Friction on textile surfaces can also cause small pods. This matting of loose fibers is called pilling - it quickly makes clothes and upholstered furniture look old. With the latter, the most important thing is to find the ideal combination of low pilling and high resistance. Resistant, solid fabrics, mainly flat and mixed fabrics, tend to form pills. However, these can be easily removed with special lint razors. To test the quality of fabrics, test pieces are clamped in a pilling tester and exposed to constant friction. The longer it takes for nodules to form, the higher the pilling resistance. The result is classified into five grades, with level 1 standing for strong nodule formation and level 5 for little or no tendency to pills. Good textiles for long-lasting upholstered furniture belong to level 3.
In addition to abrasion cycles and pilling resistance, other decisive values are the rub and lightfastness of fabrics. Rubbing fastness describes the resistance of the color of furniture fabrics to being rubbed off or rubbed off on other textiles. Jeans and T-shirt fabrics, for example, can rub off on upholstered furniture. But that can also happen the other way around. In general, light shades are more resistant to rubbing than dark ones. The scale ranges from 1 to 5, where 5 means very high rub fastness - the test is carried out both dry and wet using a rubbing fabric. When it comes to lightfastness, the resistance of the fabric to the effects of light is tested. In general, every cover fades in direct sunlight, although synthetic fibers and dark colors are more permanent than natural fibers and light colors. For the measurement process, a material sample is exposed to light and then rated on a scale from 1 to 8, where 1 denotes very low light resistance. A lightfastness level of at least 4 to 5 is recommended for upholstery fabrics. At the same time, upholstered furniture should also be protected from direct sunlight - because not only high-quality fabrics are important, but also correct handling.