Ask for a summary of the chemistry of common sense. For example, what is good for washing the kitche

Updated on Kitchen 2024-05-05
1 answers
  1. Anonymous users2024-01-23

    You can find some books on common sense to learn

    Surfactants for cleaning, solvents and adhesives are used in the production process of fabrics, genuine leather is protein, imitation leather is plastic, and the burning taste is different

    Knowledge of dermal identification.

    1: Identify the dermis.

    Hand touch: that is, touch the leather surface with your hands, if there is a smooth, soft, plump, elastic feeling is leather; However, the general artificial synthetic leather surface is astringent, rigid and has poor softness.

    See: the leather surface has a clearer hair, pattern, yellow cowhide has a more symmetrical fine pores, yak leather has coarser and sparse pores, goatskin has fish scale pores.

    Smell: All genuine leather has the smell of leather; Artificial leather has a strong pungent plastic smell.

    Ignition: Tear off a little fiber from the back of real leather and artificial leather, after ignition, where it emits a pungent smell and forms a pimple, it is artificial leather; Anything that smells like hair and doesn't have hard bumps is dermis.

    2. Identify artificial leather and synthetic leather.

    With the above four basic identification methods, it is obvious to compare and identify artificial leather and synthetic leather. In addition, artificial leather and synthetic leather also have the following characteristics:

    1. Press the leather surface with your fingers, there are no obvious pore wrinkles, if there are wrinkles after pressing, it will not disappear obviously.

    2. There are no pores on the leather surface, which is an important feature to distinguish the authenticity of leather.

    3. Cut off the corners and burn, smelly, but not the burnt smell of hair.

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