Methods of removing the trademark seal:

1. You can use wind oil essence. Because it contains peppermint oil, it has similar compatibility with oil-soluble raw materials and can be dissolved.

2. Use wine. The main component of wine is ethanol, which is also a polar solvent. However, the polarity of ethanol and water is slightly different, so you can try to use it at the beginning.

3. Rub with gasoline, which is a very good solvent.

Extended information

Maintenance methods of umbrellas

1. After use, umbrellas should be immediately put in a ventilated and dry place to dry; And apply a small amount of lubricating oil to the ribs and handles of the umbrella to prevent rust and mildew.

2. The new umbrella should not be put on hold for a long time, so as to avoid brittleness and deterioration due to too long storage;

3. When the umbrella is folded, hold the top of the umbrella, and try not to touch the ribs with your hands to avoid damage.

"Similar compatibility": If the polarities of two substances are similar, the two substances are easily dissolved in each other. When measuring the mutual solubility between different substances, we can examine whether the polarity between them is similar. Substances with strong polarity are easily dissolved in solvents with strong polarity, while substances with weak polarity are easily dissolved in solvents with weak polarity. Of course, nonpolar substances are easily dissolved in nonpolar solvents.

Specifically, it can be understood as follows:

1. Polar solvents (such as water) are easy to dissolve polar substances (such as strong acids in ionic crystals and molecular crystals);

2. nonpolar solvents (such as benzene, gasoline, carbon tetrachloride, etc.) can dissolve nonpolar substances (most organic substances, Br2, I2, etc.).