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Workers can be seriously harmed by the carbon disulfide used to make most rayon.The solubility of nitrocellulose in organic solvents such as ether and acetone was the basis for the first "artificial silk" by Georges Audemars in about 1855.
The sulfuric acid reacts with a complex compound of copper and dissolves it. After some time, sulfuric acid reacts with the complex compound and washes out the copper salts from the fibers. Rayon is a manufactured fiber made from regenerated cellulose fiber.
Commercial production started in 1891, but the result was flammable and more expensive than cellulose acetate or cuprammonium rayon.
Because of this expense, production ceased early in the 1900s.
v=U6t Jk1d VIfw&feature=related Ever since last month’s China International Medical Equipment Fair in Shenzhen, China, a curious video (above) has been spreading across the blogosphere.
The gadget in question is apparently an automatic sperm collector, an all-in-one machine into which men can donate sperm (hands-free).
The video treats the entire subject in a rather ridiculous manner, raising two questions: How does this gadget actually work? Today, there are in fact several companies selling automatic sperm collectors on the internet (here, here, and here, for example). A little lower is a “semen-collection sheath,” which purportedly simulates the feel and movement of a vagina.],” which consists of two inflatable tire-like structures.
Your average sperm-collecting gadget consists of a kiosk with a monitor that provides stimulating visuals (! Once enveloping a penis, the sheath continues vibrating until the man, er… The robotic sperm collector apparently has a “high success rate of 95%.” (I’ll leave it at that.) And it’s touted as “safe” because the man actually deposits his donation into a condom-like pocket, which a sperm-bank worker can then collect.The many types and grades of rayon can imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen.The types that resemble silk are often called artificial silk.Nathan Rosenstein invented the "spunize process" by which he turned rayon from a hard fiber to a fabric.This allowed rayon to become a popular raw material in textiles.You can own many of these recipes– and many more — in my book, Abbey Cooks Entertain: 220 recipes inspired by Downton Abbey, Seasons 1 – 5 SPOILER ALERT: if you haven’t seen all episodes, you may wish to quickly scroll down to the bottom to collect the recipe.