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Stretcher bars are also used in picture framing when framers are framing things like sport shirts etc. Stretcher bars are used extensively in theatrical productions for framing material backdrops. When a photographer takes a picture then digitally transfers this onto a canvas via inkjet printing, he then stretches this over a stretcher frame.
The back of a stretched canvas, with keys inserted at the corner, and additional keys off to the side. A tightening key is a small wedge or shim used in the construction of a canvas stretcher frame with expandable joints. The key is inserted into the slotted inside the stretcher bars at the mitered corners of the frame to prevent or adjust sagging.
Strainer bar frames are usually in the shape of a rectangle, although shaped canvases are also possible. [1] A stretcher frame constructed from strainer bars should not be confused with one constructed from stretcher bars. Strainer bars are fixed to one another with wood glue, nails or staples, often in conjunction.
Canvas on stretcher bar. Canvas has become the most common support medium for oil painting, replacing wooden panels. It was used from the 14th century in Italy, but only rarely. One of the earliest surviving oils on canvas is a French Madonna with angels from around 1410 in the Gemäldegalerie, Berlin.
However, patches are sometimes applied to strengthen specific areas of a canvas. [8] Strip linings can be added to reinforce the margins of a painting. This practice is important as the margins of a painting are often more damaged than the rest of the canvas. [2] Strip linings strengthen the edges of the canvas so that they can withstand re ...
The Neil Robertson stretcher (NRS) is believed to have been influenced by a Japanese stretcher made from bamboo. The NRS was designed with the purpose of packaging casualties into a compact form, allowing for rescue operations in spaces with limited openings and facilitating movement through vertical escape hatches while minimizing slippage.
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