The compass is made of bakelite now. I feel that most brands on the market are bakelite. Bakelite is also easy to produce and process, and can be mechanized. However, it is said that there are domestic bakelite and imported bakelite. The price also varies greatly. You can ask the landlord in this regard, and you will know that bakelite is formed after cooling, which means you need to have molds first, and then work on the assembly line one by one. There are many factories that process bakelite. You can Baidu your local factory. So if the temperature is very high, I don't know if it will be deformed. For example, putting a compass in the car in the sun in summer, but this kind of opportunity should be rare.
There are also solid wood, such as Wan 'an, which is carved from solid wood. Then it is to strengthen the use of high-density boards. It seems that only Jiyitang is using this high-density material. It is said that it is very difficult to make synthetic wood, because there is no abrasive tool to use when processing it, and it is time-consuming and laborious to cut it with a knife and do it side by side. However, the texture is good, lighter than bakelite, feels good and will not be deformed.
Give points, I hope I can help you.