| 1 | It has reference value for the comprehensive utilization and deep processing ... | |
| 2 | The polymerizing ferric sulfate can be produced by oxidizing copperas which is the by product of titanium dioxide and adding polymerizer. | |
| 3 | When in use, the raw materials are only needed to be crushed and mixed with water, and then can be applied to an affected part. | |
| 4 | After completion of laconic epistolary compositions she abandoned the implement of calligraphy in the encaustic pigment, exposed to the corrosive action of copperas , green vitriol and nutgall. |
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