热敏纸对潜在印刷显影提出了重大挑战,因为当将传统指纹显影制剂应用于其时,其倾向于改变颜色。在这项研究中,的最佳成分,1,2-茚二酮,1,8-diazafluoren-9-one(DFO),通过系统地调整试剂的相对量,确定了在热敏纸上产生清晰指纹的5-甲基硫代氢(5-MTN),极性溶剂,和非极性稀释剂石油醚,然后在文本打印热敏纸上进行验证。具体来说,3.0%乙酸乙酯作为石油醚中的极性溶剂被发现是最优的组合;的最佳稀释比例,DFO,和5-MTN与石油醚的原始溶液分别为1至2、11和7。1,2-茚二酮在石油醚中的最佳浓度为0.125g/L,用一串0.5%的乙酸乙酯在石油醚中。
Thermal paper poses a significant challenge to latent print development as it tends to change color when traditional fingerprint development formulations are applied to it. In this study, the optimal components of ninhydrin, 1,2-indanedione, 1,8-diazafluoren-9-one (DFO), and 5-methylthioninhydrin (5-MTN) for yielding clear fingerprints on thermal paper were determined by systematically adjusting the relative amounts of the reagents, polar solvents, and the nonpolar diluent petroleum ether, followed by validation on text-printed thermal paper. Specifically, 3.0% ethyl acetate as the polar solvent in petroleum ether was found to be the optimal combination; the optimal dilution ratios of ninhydrin, DFO, and 5-MTN original solutions with petroleum ether were 1 to 2, 11, and 7, respectively. The optimal concentration of 1,2-indanedione in petroleum ether was 0.125 g/L, with a string of 0.5% ethyl acetate in petroleum ether.