What is the difference between ABS and PBT keycaps?

[VanHenry]

Here are the specific differences between ABS and PBT keycaps: 1. In terms of feel: ABS material has a finer texture and smoother grain, while PBT material feels relatively rougher. 2. In terms of oil resistance: ABS material outperforms PBT in oil resistance, wear resistance, and smoothness. 3. In terms of light transmission: Common backlit keycaps are made of ABS material, which can be semi-transparent to accommodate backlight needs; PBT material's backlit keycaps have poor light transmission as they are semi-transparent, making it difficult to clearly see the characters.