Acetone

Acetone is a good solvent for most plastics and synthetic fibers including those used in laboratory bottles made of polystyrene, polycarbonate and some types of polypropylene. It is ideal for thinning fiberglass resin, cleaning fiberglass tools and dissolving two-part epoxies and superglue before hardening. It is used as a volatile component of some paints and varnishes. As a heavy-duty degreaser, it is useful in the preparation of metal prior to painting, it also thins polyester resins, vinyl and adhesives.

Lighter Cigarette Stories

every day I use lighter but do not know about the story, what year was first created or who the creator. Out of curiosity I tried to find the history of lighter. I believe in every six of the 10 houses has a lighter, especially if you are a smoker, maybe even have more than one ligher. From wikipedia here's what I got.

zippo lihters
Zippo Lighter
The first lighters were invented in the 16th century and were converted flintlock pistols that used gunpowder. One of the first lighters was invented by the German chemist named Johann Wolfgang Döbereiner in 1823 and was often called Döbereiner's lamp. This lighter worked by a reaction of hydrogen to platinum sponge, which gave off a great amount of heat. The device was very large and highly dangerous and fell out of production by the end of the 19th century.

The patenting of ferrocerium (often misidentified as flint) by Carl Auer von Welsbach in 1903 has made modern lighters possible. When scratched, it produces a large spark which is responsible for lighting the fuel of many lighters, and is suitably inexpensive for use in disposable items.

During World War I, soldiers used wasted cartridges and glowing wooden blocks to make an improvised type of lighter instead of using matches because they feared that the initial spark or flare would alert sharp shooters to their position. The Zippo lighter and company were invented and founded by George G. Blaisdell in 1932. In the 1950s there was a switch in fuel choice from naphtha to butane, as butane allows for a controllable flame and has less odor. This also led to the use of piezoelectric spark, which replaced the need for a flint wheel in some lighters and was used in many Ronson lighters.