以铬黑t (T)为主要原料，通过正交试验，筛选出微量硬度指示剂的新配方。
Taking chrome black t (t) as main material, a new prescription of trace hardness indicating agent has been screened out through orthogonal test.
文章给出了指示剂带的组分及制作方法，进行了初步的试验验证。
The article presented the configuration and facture, processed elementary experience.
经过试验，可溶性还原染料能够作为一种紫外光透过强度指示剂。
Results show that it can be used to indicate ultraviolet transmission.
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