Relatively rough walls, but the kind that can't remove dust, use double-sided tape.
The wall is smooth and impervious, and the glue surface can be wiped off with water, using transparent glue.
The wall is very rough, and it is made of glue, which will fall off when touched.
In addition to double-sided adhesive, transparent adhesive and glue, there is also a kind of homemade glue.
Step 1: First, mix a proper amount of starch with a bowl of clear water, and then stir evenly with chopsticks. The ratio of starch to water is about 1: 3, and then prepare a pot to heat it.
Step 2: Then pour the stirred starch solution into the pot, turn on a small fire and keep stirring with a shovel until the color of the solution changes from white to transparent and sticky, just like this. Remember to turn on a small fire and keep stirring, so as not to burn the solution.
Step 3: Finally, we can take out the homemade starch solution. The glue couplets made by this indigenous method are very firm and easy to clean. When it's wet, just wipe it off with a towel and stick it firmly, leaving no trace.