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The extinguishers automatically trigger if a piece of film near the gate starts to burn. The projector is additionally modified to accommodate several fire extinguishers with nozzles aimed at the film gate. A special projector certified to run nitrate films has many modifications, among them the chambering of the feed and takeup reels in thick metal covers with small slits to allow the film to run through them. Projection rooms may also be required to have automatic metal covers for the projection windows, preventing the spread of fire to the auditorium. Nitrocellulose film base manufactured by Kodak can be identified by the presence of the word "nitrate" in dark letters along one edge; the word only in clear letters on a dark background indicates derivation from a nitrate base original negative or projection print, but the film in hand itself may be a later print or copy negative, made on safety film. The crucial advantage cellulose triacetate had over nitrate was that it was no more of a fire risk than paper (the stock is often referred to as "non-flam": this is true-but it is combustible, just not in as volatile or as dangerous a way as nitrate), while it almost matched the cost and durability of nitrate.

Eight Ball is a call shot game played with a cue ball and fifteen object balls, numbered 1 through 15. One player must pocket balls of the group numbered 1 through 7 (solid colors), while the other player has 9 thru 15 (stripes). Snooker is normally played using fifteen red balls, six colored balls, and one cue ball, all of which are significantly larger than pool balls. There are seven solid-colored balls numbered 1 through 7, seven striped balls numbered 9 through 15, an 8 ball, and a cue ball. The wooden triangular ball rack is the recommended device to be used to rack the balls to ensure that the balls are properly aligned and in contact with each other. If the shooter legally pockets a called/nominated ball on a shot (except a push out, see 9.4 Second Shot of the Rack - Push Out), any additional balls pocketed remain pocketed (except the ten ball; see 9.9 Spotting Balls), and he continues at the table for the next shot. So, you could be feeling MDF on the underside while there is slate above it that you can’t see because it’s covered in felt.

Nitrate dominated the market for professional-use 35 mm motion picture film from the industry's origins to the early 1950s. While cellulose acetate-based safety film, notably cellulose diacetate and cellulose acetate propionate, was produced in the gauge for small-scale use in niche applications (such as printing advertisements and other short films to enable them to be sent through the mails without the need for fire safety precautions), the early generations of safety film base had two major disadvantages relative to nitrate: it was much more expensive to manufacture, and considerably less durable in repeated projection. Today, nitrate film projection is rare and normally highly regulated and requires extensive precautions, including extra health-and-safety training for projectionists. Regardless of when and by what route it reached the British Isles and the British colonies in its recognizable form, croquet is, like pall-mall and trucco, among the later forms of ground billiards, which as a class have been popular in Western Europe back to at least the Late Middle Ages, with roots in classical antiquity, including sometimes the use of arches and pegs along with balls and mallets or other striking sticks (some more akin to modern field hockey sticks).

Durability of finish, complexities of "multiple stage" modern finishes, and other factors including environmental regulation led manufacturers to choose newer technologies. Some other early modern sources refer to pall-mall being played over a large distance (as in golf); however, an image in Strutt's 1801 book shows a croquet-like ground billiards game (balls on the ground, hoop, bats, and peg) being played over a short, garden-sized distance. In addition to the standard game of pool, there are a ton of fun games you can play. Many were opposed to the use of polyester for release prints for this reason, and because ultrasonic splicers are very expensive, beyond the budgets of many smaller theaters. By the late 1990s, polyester had almost entirely superseded triacetate for the production of intermediate elements and release prints. Although triacetate does not decompose in as dangerous a way as nitrate does, it is still subject to a process known as deacetylation, often nicknamed "vinegar syndrome" (due to the acetic acid smell of decomposing film) by archivists, which causes the film to shrink, deform, become brittle and eventually unusable. Acetate film manufactured during the era when nitrate films were still in use was marked "Safety" or "Safety Film" along one edge in dark letters.

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