Leather has always been a material used by humans since the early ages. Due to its long lasting, breathable and elegant clothes, shoes, jackets, bags and even furniture are made of leather. Leather products, however, require careful care, although they are long-lasting. The sun causes the skin to dry and sensitize. Sensitization of the skin causes cracks and flaking. Unused leather products must be stored in a dry and cool place. The stored environment is damp or contained in airtight, nylon pouches, which can cause mold on the skin over time.

Molds are visible and visible fungi in dark and damp places. In general, molds proliferate at an incredible rate when they are placed on fabrics and leather such as synthetic, cotton and wool. Mushrooms have always been on earth since the world existed. 70 is known to have more than a thousand fungus varieties, however, it is believed that there are millions of 1.5 fungus species. Mold fungi are just one of them.

The mold appearance caused by fungi is due to the decomposition of microorganisms called fungi. Mushrooms achieve their nutritional needs by breaking down the substances in their environment, in other words by decomposing them. For the formation of molds, fungi need moisture and a sun-free environment. This is why mold products are stored in leather products stored in cabinets.

The microbiology tests of leather products (wet blue) against mold growth are performed in the authorized laboratories. In order to prove that they are reliable and impartial in these studies, laboratories are authorized by domestic and foreign accreditation grants. In the meantime, many published test criteria comply with the test method and standard. The standard which is used during the mold resistance tests of leather products (wet blue) is:

• ASTM D 4576-08 Blue material (skin) anti-fungal growth test methods