By using domestic paper and ink,mechanical proofing is used to study the dot gain regularity of FM screening, thereforethe printng contrast is calculated, and the best solid density of proofing is determined,so is the grey balance.

• 采用国产的纸张和油墨，进行机械打样试验，研究调频网点的扩大规律，计算调频网点的相对反差，确定了调频网点打样的最佳实地密度，以及灰平衡数据。