Singh Narendra Nath, Brave V R, Khanna Shally
Department of Oral Pathology and Microbiology, Kothiwal Dental College and Research Centre, Moradabad, U.P, India.
J Forensic Dent Sci. 2010 Jan;2(1):11-7. doi: 10.4103/0974-2948.71051.
Cheiloscopy is the study of lip prints. Lip prints are genotypically determined and are unique, and stable. At the site of crime, lip prints can be either visible or latent. To develop lip prints for study purpose various chemicals such as lysochrome dyes, fluorescent dyes, etc. are available which are very expensive. Vermilion (Sindoor used by married Indian women) and indigo dye (fabric whitener) are readily available, naturally derived, and cost-effective reagents available in India.
To compare the efficacy of sudan black, vermilion, and indigo in developing visible and latent lip prints made on bone china cup, satin fabric, and cotton fabric.
Out of 45 Volunteers 15 lip prints were made on bone China cup 15 lip prints on Satin fabric and 15 on Cotton fabric. Sudan black, vermilion and indigo were applied on visible and latent lip prints and graded as good (+,+), fair (+), and poor (-) and statistically evaluated.
The vermilion and indigo dye gives comparable results to that of sudan black for developing visible and latent lip prints.
唇纹学是对唇印的研究。唇印由基因决定，具有独特性和稳定性。在犯罪现场，唇印可能是可见的，也可能是潜在的。为了获取用于研究的唇印，有多种化学物质可供使用，如溶色素染料、荧光染料等，但这些都非常昂贵。朱砂（印度已婚女性使用的 sindoor）和靛蓝染料（织物增白剂）在印度很容易获得，是天然来源且具有成本效益的试剂。
比较苏丹黑、朱砂和靛蓝在显影骨瓷杯、缎面织物和棉织物上的可见和潜在唇印方面的效果。
在 45 名志愿者中，15 个唇印印在骨瓷杯上，15 个印在缎面织物上，15 个印在棉织物上。将苏丹黑、朱砂和靛蓝应用于可见和潜在唇印上，并分为良好（++）、中等（+）和差（-）等级，然后进行统计学评估。
在显影可见和潜在唇印方面，朱砂和靛蓝染料与苏丹黑的效果相当。
