Scrim (material)

A scrim used in an art installation

A scrim is a woven material, either finely woven lightweight fabric widely used in theatre, or a heavy, coarse woven material used for reinforcement in both building and canvasmaking.

Light gauzy material

A scrim or gauze is a very light textile made from cotton, or sometimes flax. It is lightweight and translucent, which means it is often used for making curtains. The fabric can also be used for bookbinding and upholstery.

Scrims have also seen extensive use in theatre. The variety used for special effects is properly called sharkstooth scrim. However, in theater a scrim can refer to any such thin screen, and is made out of a wide variety of materials. Scrim has a rectangular weave that is similar in size in its openings to a window screen.

The bobbinet/bobbinette is a type of scrim that has a hexagonal hole shape and comes in a variety of hole sizes. It is used for a number of lighting effects in the film and theatre industries.

Scrim is also used in clothing, usually covering the face or head. This allows the wearer to see out, while preventing others from seeing in. This may also be combined with camouflage to completely hide a person, such as a sniper.

A scrim was also an integral part of the Beijing Olympic Stadium in Beijing. It was the screen running around the top of the stadium during the opening ceremonies on which all kinds of scenes were projected. Li Ning also ran around it just before the cauldron lighting.

A scrim (also called a screen) is used as an acoustically transparent covering for a loudspeaker to protect the diaphragm and dust cap, or as an air filter element to protect the voice coil and other components of the transducer.

Applications to stage lighting

Scrims both reflect and transmit light. This means that if a light from a front-of-house position is shone at a scrim, then both the scrim and everything behind it will be lit. This can lead to a variety of interesting effects:

  • A scrim will appear entirely opaque if everything behind it is unlit and the scrim itself is grazed by light from the sides or from above.
  • A scrim will appear nearly transparent if a scene behind it is lit, but there is no light on the scrim.
  • A dreamy or foggy look can be achieved by lighting a scene entirely behind a scrim.
  • If a light with a gobo is aimed at a scrim, the image will appear on the scrim, but also any objects behind the scrim will be lit by the pattern as well.

In general, anything that is lit will be seen on both sides of a scrim: scrims do not absorb light. Scrim can also be used in theatre in combination with a cyclorama or backdrop. The idea is similar to the other uses. When the drop is lit (or images or video are rear-projected onto the back of the drop), the images or colours projected are visible. However, when the drop is not lit, the images or colors will disappear. A scrim can also help dull the image, creating a greater sense of depth.

Another effect is caused by layering two scrims, or even by placing a mirror behind a scrim and lighting it: the familiar moire effect. This can often cause audience disorientation.

Reinforcement material

Shop windows in the United Kingdom extensively covered with scrim during the 1940-1941 Blitz
Scrim and sarking

The technique of using scrim as a reinforcement occurs commonly in the manufacture of glass-fiber or carbon-fiber composites: scrim layers may cover the exterior surface of the carbon-fiber laminate for an improved protective surface. Jute scrim can reinforce plaster in sculpture, when casting or working directly in plaster.

A similar usage of the term is found in sailcloth manufacture, where scrim is a strong loose weave of fibres laminated into the cloth to provide extra strength and stability to sails.

In carpentry, scrim is a very heavy, coarsely-woven fabric (similar to hessian or to coarse canvas) which is stretched over interior boards to provide support for wallpaper and to add an extra rigidity. This method of construction, widely used in older houses, is often referred to as "scrim and sarking", the sarking being the board.

Scrim is also an item that utilizes plies of tissue reinforced with a layer of nylon (much like fishing line or heavy duty monofilament) or cotton thread. 2-ply tissue 1-ply scrim the layer of scrim is not counted in the ply count. 2/1 would be a 2-ply scrim.

Scrim is a glass fibre (previously burlap) open-mesh tape used to cover joints in plasterboard/wall board prior to plastering. It prevents a crack appearing in the plaster finish at a later date. The roll of tape may be plain or adhesive-coated to facilitate its installation.

Scrim was handed out during World War II to tape windows, so that they should not cause hazardous shrapnel in case of bomb blasts.[1]

References

  1. ^ Molly Cutpurse: "Miriam's Family Blitz", Lilith Books, 2015, page 151.
  • Kersmaekers, Ivo (2019): Gauzes in Theatre. Their use through the ages. In: Die Vierte Wand. Organ der Initiative TheaterMuseum Berlin. 009/2019, pp. 146–151 (online at the Internet Archive)

External links

  • The dictionary definition of scrim at Wiktionary

Media files used on this page

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A logo derived from File:WiktionaryEn.svg, a logo showing a 3 x 3 matrix of variously rotated tiles with a letter or character on each tile. The derivation consisted in removing the tiles that form the background of each of the shown characters. File:WiktionaryEn.svg is under Creative Commons Attribution-Share Alike, created by Smurrayinchester, and attributed to Wikimedia Foundation. This is the version without the wordmark.
Jute nahtlos.png
Author/Creator: SoylentGreen, Licence: CC-BY-SA-3.0
Hessian Fabric made seamless. It will serve to create a normal map in Blender.
Batik Indonesia.jpg
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Batik cloth purchased in Yogyakarta, Indonesia
MacLachlan hunting tartan (D. W. Stewart).svg
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A representation of the Maclachlan hunting tartan. This tartan is the oldest tartan to bear the name MacLachlan. This tartan is referred to as the Old MacLachlan, MacLachlan, and Hunting MacLachlan. This sett was first published in Old & Rare Scottish Tartans by D. W. Stewart in 1893.
Thread count: Y6, W4, Bk32, G32, Y6, W4, R48.
Sources: MacLachlan Clan Tartan WR1710 MacLachlan Hunting Tartan
Robert Irwin Scrim Veil Black Rectangle Natural Light Whitney 2013.jpg
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Robert Irwin: Scrim Veil—Black Rectangle—Natural Light, Whitney Museum Of American Art, New York (1977) June 27–Sept 1, 2013
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Ministry of Information Second World War Press Agency Print Collection
Scrim and sarking wall 02.jpg
Author/Creator: Grutness, Licence: CC BY-SA 4.0
A wall constructed with sarking (wooden planks) covered with scrim (loose rough hessian)