对助留剂或助滤剂方案的实验室评估是考虑纸机工艺变化(即产品化学,剂量或添加点)的第一步。改变工艺条件有很多原因,比如浆厂的操作、纸张的种类结构、封闭程度等。纸机运行时间宝贵,在没有实验室数据支持的情况下进行工厂试验花费很大。因此对助留和助滤化学品周期性的实验室 Laboratory evaluation of retention or drainage aids programs is the first step in considering changes in the paper machine process (ie product chemistry, dosage or addition points). There are many reasons for changing the process conditions, such as the operation of the pulp mill, the type of paper structure, the degree of closure, and the like. Machine running time is precious and factory testing without laboratory data is costly. Therefore, for retention and drainage of chemicals periodic laboratory