Will a black chalk chalk on a white blackboard?

黑色的粉笔会在白色的黑板上写字吗?

Then almost forgotten, at the top of this page is a simple drawing of a gentle smile, sketch lightly in black chalk.

然后几乎被忘记了，在这一页的顶部是一个简单的画一个温柔的微笑，轻轻地在黑色粉笔素描。