Yu R, Koran A, Raptis C N, Craig R G
J Dent Res. 1981 Oct;60(10):1754-8. doi: 10.1177/00220345810600100501.
In this study, environmental stains were removed from maxillofacial elastomers by solvent extraction. Silastic 44210, an RTV silicone with proven color and physical property stability, was stained with lipstick, disclosing solution, and methylene blue. These stains were then removed by solvent extraction with each of four chemically dissimilar solvents, namely: toluene, benzene, 1,1,1-trichloroethane, and n-hexane. An additional series of samples was prepared with 11 maxillofacial pigments, not for staining, but for evaluation of pigment stability. Results obtained from spectrophotometric measurements before and after solvent extraction demonstrated the effectiveness of solvent extraction in removing stains, while there was little or no change in the color of the pigments or the base elastomer.
在本研究中，通过溶剂萃取去除了颌面弹性体上的环境污渍。Silastic 44210是一种室温硫化硅橡胶，具有经证实的颜色和物理性能稳定性，用口红、显示液和亚甲蓝进行染色。然后用四种化学性质不同的溶剂，即甲苯、苯、1,1,1-三氯乙烷和正己烷，通过溶剂萃取去除这些污渍。另外制备了一系列含有11种颌面颜料的样品，不是用于染色，而是用于评估颜料稳定性。溶剂萃取前后通过分光光度测量获得的结果表明，溶剂萃取在去除污渍方面是有效的，而颜料或基础弹性体的颜色几乎没有变化。
