After testing many red lipsticks I am yet to find my favourite red color something which will suit most Indian skin tone.What according to you is the best red lipstick shade which suits you the best(Indian olive skin tone)
Lipstick is a cosmetic product containing pigments, oils, waxes, and emollients that apply color, texture, and protection to the lips. Many varieties of lipstick exist. As with most other types of makeup, lipstick is typically, but not exclusively, worn by women. The use of lipstick dates back to ancient times.
In forensic science, comparative examinations are usually based on the physical or chemical nature of a substance, or both. Lipsticks are composed of waxes, oils,organic dyes and inorganic pigments. Color matching can do identifying the lipstick responsible for leaving a smear. This color analysis may be used to identify the lipstick found at the crime scene. The colors of lipstick are often due to a mixture of several pigment compounds. These pigments can be separated using thin layer chromatography. Depending on the type of pigment, the mobile phase will vary. Lipsticks are soluble in toluene, so toluene serves as the mobile phase. After separation, the chromatogram is complete and illustrates the different pigments that make up a particular color of lipstick.
Traces of Lipsticks, cosmetics, nail polish, or other smears could be found left on drinking cups, glasses, cigarette butts, and tissue papers and may all be significant forensic evidence in the investigation of a crime, especially in cases such as a sexual assault or a homicide. This physical evidence may be found on clothing, parts of the body, a tissue, or cigarette. By comparing the composition of a lipstick smear with that of a victim, forensic scientists can demonstrate indirect proof of contact or a relationship between victim and suspect. Also, it is sometimes possible to extract saliva DNA from the print and may link a suspect to a crime scene. Various methods of forensic lipstick analysis were reported. Small amount of lipstick (approximately 10 μg) could lead to good comparisons in TLC.
Thin Layer Chromatography (TLC) is a widely used chromatography technique used to separate chemical compounds. Thin-layer chromatography incorporates a solidstationary phase and a moving liquid phase to cause a separation of the constituents of a mixture. Although simple test may be run by simply allowing a solvent to pick up a piece of porous paper, a more revealing test requires the preparation of a plate. Because most compounds are colorless, no separation will be noticed after development unless the materials are visualized. This is may be done by: • Exposing to UV light • Exposing to fluorescent dyes • Exposing to iodine • Spraying with a reagent
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