Scraping or Blasting : Scraping is the process comes after whiskering on denim. Its totally a different process then whisker. Scraping is done with the help of scrap paper or other scraping materials. But usually it is done with a scrap paper made of silicon. There are different methods of scraping in the denim industry. Hand scraping, Sand scraping, Blasting scraping, Machine scraping, etc.
Hand or Sand scraping is done in denim for distress look. It is done on the front thigh, upper back knee, upper pocket side, or it can be overall. It is widely used Emery paper to scrape denim on different position by hand or machine. There are different types of Emery Paper found. It basically start from 40 to 600 and above. Lower number differs the rough and tough but the higher number is more smother.
In garments industry 200, 250, 300, 400 paper are widely used. The main purpose of doing the scraping is to turn out the garment in a worn out look. It is carefully done with the fabric intensity and strength. It is important to select right number paper for right fabric. If it is not done the fabric become damage. Feathering or margining the area should be done with proper way that it look like the natural not artificial.
Scraping is done in a rubber balloon where the body kept wearing. It can also be done in a plain wood or plain like pattern where the body kept straight. While scraping with hand, pressure should be uniform in order to get a good result. While doing it with machine the machine pressure should be selected at a uniform way so that it comes a good result. It should be started from the intense part