If appear serious statified phenomenon, show quality is poorer; Churn gently with the rod, after raising, coating is on the rod retention period is longer, enclothe even, explain quality is better; Twist with handle gently, more exquisite better.

• 假如出现严重的分层现象，表明质量较差；用棍轻轻搅动，抬起后，涂料在棍上停留时间较长、覆盖均匀，说明质量较好；用手轻捻，越细腻越好。