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2. Rubylith - Wikipedia

   en.wikipedia.org/wiki/Rubylith

   Rubylith consists of two films sandwiched together. The bottom layer is a clear polyester backing sheet; the top layer is a translucent, red-(ruby-)coloured sheet. The top layer can be cut and peeled away from the bottom layer.

3. Transparency (projection) - Wikipedia

   en.wikipedia.org/wiki/Transparency_(projection)

   Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.

4. Variations (Cage) - Wikipedia

   en.wikipedia.org/wiki/Variations_(Cage)

   The score consists of eleven transparent sheets: six with lines and five with points. The mechanism is the same as in Variations I : perpendiculars are dropped from points to lines to determine sound characteristics, except that the list of characteristics is different: frequency, amplitude, timbre, etc.

5. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   Appeldorn developed a process for the projection of transparent sheets that led to 3M's first marketable transparency film. The Strategic Air Command base in Omaha was one of the first big clients, using circa 20,000 sheets per month. 3M then decided to develop their own overhead projector instead of the one they had been selling until then ...

6. Photographic film - Wikipedia

   en.wikipedia.org/wiki/Photographic_film

   Print film, when developed, yields transparent negatives with the light and dark areas and colors (if color film is used) inverted to their respective complementary colors. This type of film is designed to be printed onto photographic paper, usually by means of an enlarger but in some cases by contact printing. The paper is then itself developed.

7. Prime Day’s over, but these hotel-worthy sheets are still ...

   www.aol.com/amazon-best-cheap-sheets-180419648.html

   These sheets have over 250,000 ratings. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...