1, the cost of foot patch is high, but the cost of ginger powder and wormwood is low, so it is adopted by many foot patches, but the effect is average.
2. According to the raw materials and technology of the foot patch, it can be judged that there is little difference among various foot patches except that several old ones adopt unique formulas, but even so, there are still some illegal counterfeiters who make inferior foot patches in order to reduce costs and highlight the effect of black oil on the surface.
3. The really good foot patch powder is reddish brown, the cheap ones are mostly smoky gray, and the inferior ones are white, that is, the darker the color, the higher the cost, and the high-purity bamboo sticks are used, which only the people who produce foot patches can understand.
4. As can be seen from the above, only by adopting a unique formula and selecting high-quality materials for foot stickers can it be called old Beijing with high cost.