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2. Projection screen - Wikipedia

   en.wikipedia.org/wiki/Projection_screen

   Switchable projection screens can be switched between opaque and clear. In the opaque state, projected image on the screen can be viewed from both sides. It is very good for advertising on store windows. Inflatable movie screen. Mobile screens usually use either a pull-down screen on a free stand, or pull up from a weighted base.

3. Negative pulldown - Wikipedia

   en.wikipedia.org/wiki/Negative_pulldown

   The majority of 35 mm film systems, cameras, telecine equipment, optical printers, or projectors, are configured to accommodate the 4-perf system; each frame of 35 mm is 4 perforations long. 4-perf was (and remains) the traditional system, and the majority of projectors are based on 4-perf, because 4 perforations is the amount needed per frame vertically in order to have enough negative space ...

4. Refresh rate - Wikipedia

   en.wikipedia.org/wiki/Refresh_rate

   In the case of filmed material, as 120 is an even multiple of 24, it is possible to present a 24 fps sequence without judder on a well-designed 120 Hz display (i.e., so-called 5-5 pulldown). If the 120 Hz rate is produced by frame-doubling a 60 fps 3:2 pulldown signal, the uneven motion could still be visible (i.e., so-called 6-4 pulldown).

5. The 10 Best 4K TVs That Guarantee a Great Viewing ... - AOL

   www.aol.com/10-best-4k-tvs-guarantee-131600386.html

   All you’ll need is a big pull-down screen, which typically costs less than $300. $2599.00 at amazon.com Our Expert Stewart Wolpin Makes Sense of This Alphabet Soup: HDRs, 8K, and ARC.

6. Who knew you could get a 120-inch projector screen for just ...

   www.aol.com/entertainment/create-true-home...

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7. Black Widow (paint mix) - Wikipedia

   en.wikipedia.org/wiki/Black_Widow_(paint_mix)

   Black Widow (also known as a Black Widow Ultra in Europe) is a non-commercial open source project to design a paint mix for the base of a DIY projection screen.Anonymous DIYers responsible for popularizing Black Widow in the DIY community include Mechman Alternators (US), Wbassett (US) and Custard10 (EU). [1]