由于抛光盘面本身并不具备磨削能力，所以磨粒全部有悬浮液提供，那么悬浮液中磨粒的粒径控制直接决定抛光后划痕的控制，优质的金刚石悬浮液，必须要有高成色的金刚石做保障，对于多晶金刚石悬浮液来说，颗粒的不规则程度很重要，刃口越多，磨削速度越快，抛光效果就也好；此外还要对金刚石进行非常严苛的粒径分级，防止划痕的交叉污染。

磨抛的过程一般要有粗磨、精磨和抛光三个磨抛工序，要求较高的样品还要把抛光分为粗抛和精抛两步来实现才能达到理想的观测表面。每一步工序结束要有彻底的清洁工序，以消除上道残留磨粒干扰下道工序。

The ultimate goal of metallographic sample preparation is to prepare a flat mirror surface for observation after corrosion or direct observation. The importance of grinding and polishing is obvious. If cutting and mounting are the preliminary steps of sample preparation, then grinding and polishing are the most important steps in the sample preparation process. Friends who are fortunate enough to avoid the cutting and mounting processes should be more cautious and careful in the grinding and polishing stage, otherwise the work will fail.

For metallographic practitioners, when they see a beautiful metallographic photo, they always can't let it go, and they can't help but sigh that other people's microscopes are different. However, this is not the case. The wonderful photos are first polished, and the well-polished samples are not demanding on the microscope.