From the modern concept, lipstick is a portable cosmetics, in ancient times, it existed in the form of lipstick, mostly packed in small boxes and the like, and when you take it, wipe it with your hands. Those with poor conditions can't buy lipstick, and they will also use red paper instead.

Gu Nansang wanted to package lipstick as lipstick, and then use marketing methods to expand the area of publicity, and the first problem he encountered was how to make lipstick with modern technology.

Generally speaking, lipstick is a rotating spiral device, Gu Nansang has also used a lot in her previous life, but a lot of lipstick is thrown away before she runs out, and she is not very clear about the structure inside, but she vaguely knows a little principle.

If you want to apply it in practice, it will take some time to figure it out.

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Chapter 63 of "The Old Wind Cuts the New Mulberry", the Mid-Autumn Festival Night Market is in the middle of the hand, please wait a moment,

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