The latex with higher core T_g has more obvious core-shell structure, and the pencil hardness of the film is higher.
较高的核玻璃化温度则有利于形成明显的核壳结构乳胶粒子，且有助于漆膜硬度的提高。
2
The test pencil is simple and reasonable in structure, wide in measuring range and high in safety, can eliminate induced electricity, and is high in accuracy of judging energizing of conductors.