Description
The shell of the oil key chain is usually made of clear acrylic or plastic. This material is lightweight and durable, suitable for making small pendants. The liquid inside the key chain is white mineral oil (mineral oil). This oil has a low viscosity that makes the floating effect possible. White mineral oil does not evaporate, so it can hold the effect of a key chain for a long time. To give the liquid its color, the manufacturer adds a toner to the white mineral oil. These toners can be a variety of colors, such as red, blue, green, etc. By adjusting the proportion of toner, you can make different color effects. There are usually some cute floating dolls inside the oil key chain, such as ducklings, turtles, stars and so on. These dolls are made of resin, which has a density between water and white mineral oil, so they can float on liquid surfaces.
