Solid rosin is good.

Solid rosin is a processed rosin product with high purity and stability. Solid rosin is widely used in various industries, such as musical instruments, woodworking, coatings and other fields. It has good stickiness and adhesion, providing long-lasting protection and bonding. In contrast, liquid rosin may have volatilization and flow problems during use and is not as stable as solid rosin. In addition, solid rosin can be heated and dissolved as needed, making it more convenient to use. So, all things considered, solid rosin is better.