TESTEX Textile Test Instrument

   The origin of KN95 and N95  KN95 mask according to Chinese standard GB 2626-2006, “respiratory protection products self-suction filtered anti-particle respirator”, the filter element is divided into KN and KP according to the filtration performance. KN is suitable for filtering non-oily particles, KP is suitable for filtering oily and non-oily particles. The product is marked as GB2626-2006 standard, KN95 type. According to the level of filtration efficiency, the level of filtration elements, the face masks can be divided into six categories of KN90, KN95, KN100, KP90, KP95, KP100 (of which the full mask does not include KN90 and KP90). KN95 mask is a non-oily particulate filtering efficiency of more than 95% of the self-absorbing filter anti-particle respirator. The N95 mask is certified in accordance with Appendix K-Filtered Particulate Filters of NIOSH-42CFR Part 84, Standard Certification for Respiratory Protective Equipment. Appendix K divides ...

  Textile dyeing is an essential process for textile processing. Mastering the basic knowledge of textile dyeing and understanding the properties and of common dyestuffs and dyeing methods can help us to select and use dyestuff reasonably, develop the dyeing process correctly for dyeing processing and obtain high-quality dyed textiles. Textile Dyeing Basics 1 What is textile dyeing? Textile dyeing is the process of dyeing textiles products into colored objects by using physical or chemical methods to allow dyes to bond with fibers. Dyeing requirements: uniform dyeing with good color fastness. 2 Dyeing principle: color properties of dyes Dyes have chromophore and auxochrome in their molecular structure, which selectively absorb visible light. When the chromophore and the auxochrome are different, the dyes absorb light differently, and therefore, different dyes have different colors. In addition to differences in hue, the colors of dyes also differ in brightness and saturation. Hue i...