Have you ever wonder how does a crime scene investigator, known as a CSI, discover blood spatter on different fabrics, which is not visible to the human eye? The key is bluestar. According to the article “Influence of Bluestar Reagent on Blood Spatter Stain of Different Fabrics” by Arnon Grafit, bluestar is a “luminol-based reagent that is applied by spraying on surface.” Not only that, but “it helps obtain DNA and to analyze spatters patterns. By analyzing the article the reader is able to understand how bluestar works through the rhetorical techniques used. First, logos which shows how the author reasons and the soundness of the argument. Second, ethos which shows the writers credibility and integrity. Lastly, diction by choice of words used. What increases the readers understanding of the bluestar reagent is the author’s use of logos. In this article the author Arnon Grafit, give the reader a grasp of the use of bluestar. Arnon Grafit tested four fabrics, which are a white cotton, pale blue jean cotton, blend of pale blue, which was half cotton and half polyester, and a white polyester. With all fabrics, he tested it with bluestar, by the use of someone blood, which he spattered in different angle. After some days, he test each fabric, and according to the article each had different results. As a …show more content…
His choice of words does not just bring understanding to the reader, but it also helps the reader to think. In the article the author uses the word chemiluminescent, which is a chemical reaction that does not produce significant quantities of heat. He explains that with this it would be hard for them to find the evidence. Another word he used is fluorescence, which is the visible or invisible radiation emitted by certain substances as a result of incident radiation. Throughout the article the author uses plenty other word for the article, but he mainly elaborate on these two