This technique is well-worth mastering for home cooks, as it's an easy way to cope successfully with thick steak and chop-style cuts of beef, pork and other meats. Step 1 Take the sirloin filets out of the refrigerator 45 to 120 minutes before you plan to cook them; chilled beef doesn't cook evenly.
The refractive index of current eyeglass lens materials ranges from 1.498 (CR-39 plastic) to 1.74 (a specific variety of high-index plastic). So for the same prescription power and lens design, a lens made of CR-39 plastic will be the thickest lens available, and a 1.74 high-index plastic lens will be the thinnest.
1 Cleaning the lens mount â a very important part of the process that sometimes requires me to clean the mount several times due to oil and dirt. 2  Apply the same lens cleaning solution on microfiber cloth and clean the mount thoroughly.y process of cleaning lenses is divided into three parts: 1  Cleaning the exterior of the lens, including the lens hood â I first start off by using wet microfiber cloth to remove any dust or dirt from lens exterior and lens hood.