Siping (rubber) wear and extends the life of the tire. Both Bridgestone and Michelin sell snow tires that are siped at the factory, while Saf-Tee Siping and Grooving sells machines that can sipe most standard vehicle tires. Siping can also be done by hand. Siping tires may void the manufacturer's warranty. Claims that extended life is achieved by siping may only apply to certain environments, operating temperatures, and rubber compound builds. Siped soles are a characteristic feature of boat shoes. Siping (rubber) Siping is a process of cutting thin slits across a rubber surface to improve traction in wet or icy conditions.
Shelby Gem Factory Hardy. Larry Paul Kelley and his wife Jo Kelly later retained full ownership making the Shelby Gem Factory a family business. The Shelby Gem Factory initially produced only synthetic ruby, with ruby lasers being the principal application, to firms primarily in California. However, the greater profit potential of transmuting ruby rods into gemstones led to a change in the enterprise's focus. A colorless variant crystal was developed by experimentation with different materials and proportions. This was the first simulated diamond variety. It became the first business anywhere to mass-produce cubic zirconia (CZ). In the 1970s the Shelby Gem Factory rode