Keep case
Encyclopedia
DVD
A DVD is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs offer higher storage capacity than Compact Discs while having the same dimensions....
(and sometimes CD
Compact Disc
The Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...
) packaging. From the well-known brand Amaray, this type of case is often called Amaray case, creating a genericized trademark
Genericized trademark
A genericized trademark is a trademark or brand name that has become the colloquial or generic description for, or synonymous with, a general class of product or service, rather than as an indicator of source or affiliation as intended by the trademark's holder...
and ambiguities about the real manufacturer of the case.
Besides DVD-Video
DVD-Video
DVD-Video is a consumer video format used to store digital video on DVD discs, and is currently the dominant consumer video format in Asia, North America, Europe, and Australia. Discs using the DVD-Video specification require a DVD drive and a MPEG-2 decoder...
films, keep cases are used in most video games for the PlayStation 2
PlayStation 2
The PlayStation 2 is a sixth-generation video game console manufactured by Sony as part of the PlayStation series. Its development was announced in March 1999 and it was first released on March 4, 2000, in Japan...
, Nintendo GameCube
Nintendo GameCube
The , officially abbreviated to NGC in Japan and GCN in other regions, is a sixth generation video game console released by Nintendo on September 15, 2001 in Japan, November 18, 2001 in North America, May 3, 2002 in Europe, and May 17, 2002 in Australia...
, Wii
Wii
The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others...
, Xbox
Xbox
The Xbox is a sixth-generation video game console manufactured by Microsoft. It was released on November 15, 2001 in North America, February 22, 2002 in Japan, and March 14, 2002 in Australia and Europe and is the predecessor to the Xbox 360. It was Microsoft's first foray into the gaming console...
, and Xbox 360
Xbox 360
The Xbox 360 is the second video game console produced by Microsoft and the successor to the Xbox. The Xbox 360 competes with Sony's PlayStation 3 and Nintendo's Wii as part of the seventh generation of video game consoles...
as well as PC
Personal computer
A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...
titles and MP3
MP3
MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is a patented digital audio encoding format using a form of lossy data compression...
-CD audiobooks.
Materials and features
Polypropylene
Polypropylene , also known as polypropene, is a thermoplastic polymer used in a wide variety of applications including packaging, textiles , stationery, plastic parts and reusable containers of various types, laboratory equipment, loudspeakers, automotive components, and polymer banknotes...
plastic
Plastic
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...
with a transparent polyethylene
Polyethylene
Polyethylene or polythene is the most widely used plastic, with an annual production of approximately 80 million metric tons...
outer jacket, usually with a printed paper sleeve behind it. A variety of colors are produced, including a lime green version exclusive for Xbox
Xbox
The Xbox is a sixth-generation video game console manufactured by Microsoft. It was released on November 15, 2001 in North America, February 22, 2002 in Japan, and March 14, 2002 in Australia and Europe and is the predecessor to the Xbox 360. It was Microsoft's first foray into the gaming console...
games. On the inside are sets of clips that may hold a booklet or additional sheets of paper with extra information. The DVD is held into place with a small protrusion (a "hub") which fits into the hole in the DVD. For console games like the PlayStation 2
PlayStation 2
The PlayStation 2 is a sixth-generation video game console manufactured by Sony as part of the PlayStation series. Its development was announced in March 1999 and it was first released on March 4, 2000, in Japan...
and Nintendo GameCube
Nintendo GameCube
The , officially abbreviated to NGC in Japan and GCN in other regions, is a sixth generation video game console released by Nintendo on September 15, 2001 in Japan, November 18, 2001 in North America, May 3, 2002 in Europe, and May 17, 2002 in Australia...
, an extra protrusion is available for storing memory cards.
Types of hubs
The structural differences between a CD and a DVD have led many manufacturers to study different hub designs for keeping the DVD (or the DVDs, in multi-disc cases) in place: unlike CDs, which are made from one layer of plastic material, DVDs have two layers, which are thinner (so that together they reach the same thickness of a CD) and not bonded all the way to the center. As a result, a DVD hub is weaker than a CD's, and may be damaged if stored in a case which is designed for CDs only.}In addition to "pluck hubs" (which are often a simple evolution over the classical "crown of teeth"), "push-to-release" hubs are very common: in this case the hub is made in such a way that simply pushing on it with a finger which pushes its component parts closer to each other, thus shrinking the space it occupies and releasing the disc center; under normal situations the release cannot occur accidentally and requires someone to push on the hub (this is obviously more difficult to obtain in slim and ultra-slim cases, where in fact pluck hubs may be preferred to push-type ones).
Damage risk
The larger size of the keep case compared to the CD jewel box means that if the disc becomes detached from the center hub, it can move around inside the box, and the playable surface can be scratched by the hub. This can be a problem during shipping.The center "Pluck-Hubs" are designed to keep a disc in place while shipping, but usually are too tight. The disc can be damaged upon removal due to excess warping. The edges of the center hub can be permanently bent in slightly to allow for a looser fit. The disc now slip out easily, ideal for the home shelf.
Case
The height and width of a (closed) keep case are fixed at 190mm and 135mm, respectively.The thickness may vary to accommodate more discs ("multi" case) or to require less shelf space ("slim" or "thin" case). For a typical single-disc case it is 15mm.
A keep case, thus, approximates the Video Software Dealers Association
Entertainment merchants association
The Entertainment Merchants Association is the not-for-profit international trade association dedicated to advancing the interests of the $32 billion home entertainment industry....
recommendation that a single-disc DVD-Video
DVD-Video
DVD-Video is a consumer video format used to store digital video on DVD discs, and is currently the dominant consumer video format in Asia, North America, Europe, and Australia. Discs using the DVD-Video specification require a DVD drive and a MPEG-2 decoder...
package have the same height as a VHS tape (187 mm) and the same width as a CD jewel case (142 mm).
Paper sleeve
The printed paper sleeve for a standard DVD case can be printed on a standard A4 sheet of paper which, after cropping, can be slipped into the outer jacket. The paper room on the front and back panels of the case is 129.5mm × 183mm and spine panels have a width of 14mm or less. This gives 273mm × 183mm as resulting maximum overall dimensions for the printout (which is less than the 297mm × 210mm of an A4 paper sheet).Inserts
Booklet inserts or leaflet material, when folded closed, should measure to a maximum of 120mm × 180mm.Similar, though not identical, packaging is used for commercial Blu-ray Disc
Blu-ray Disc
Blu-ray Disc is an optical disc storage medium designed to supersede the DVD format. The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Blu-ray Discs contain 25 GB per layer, with dual layer discs being the norm for feature-length video discs...
titles and was used for HD DVD
HD DVD
HD DVD is a discontinued high-density optical disc format for storing data and high-definition video.Supported principally by Toshiba, HD DVD was envisioned to be the successor to the standard DVD format...
titles. However, the dimensions of the cases are somewhat different, about 19 mm shorter. The individual cases are color-coded, with blue being used for Blu-ray and red for HD DVD, and the format displayed prominently on a stripe above the cover art
Cover art
Cover art is the illustration or photograph on the outside of a published product such as a book , magazine, comic book, video game , DVD, CD, videotape, or music album. The art has a primarily commercial function, i.e...
. Some companies such as Disney, Paramount
Paramount Pictures
Paramount Pictures Corporation is an American film production and distribution company, located at 5555 Melrose Avenue in Hollywood. Founded in 1912 and currently owned by media conglomerate Viacom, it is America's oldest existing film studio; it is also the last major film studio still...
, and Warner Bros.
Warner Bros.
Warner Bros. Entertainment, Inc., also known as Warner Bros. Pictures or simply Warner Bros. , is an American producer of film and television entertainment.One of the major film studios, it is a subsidiary of Time Warner, with its headquarters in Burbank,...
release DVDs without inserts (although Disney does it sporadically).
Usage
According to the Internet Movie DatabaseInternet Movie Database
Internet Movie Database is an online database of information related to movies, television shows, actors, production crew personnel, video games and fictional characters featured in visual entertainment media. It is one of the most popular online entertainment destinations, with over 100 million...
, as of October 30, 2006, there are 18,313 DVDs with sufficient information in the database that are packaged in a keep case.
In the days before video games were released on optical media, cartridges would sometimes come packaged in specially designed plastic keep cases with lugs inside to hold the instruction manual, as opposed to pressboard boxes (which buyers seldom kept along with the game, and are therefore very collectible today). Cartridges and cards for the Sega Master System
Sega Master System
The is a third-generation video game console that was manufactured and released by Sega in 1985 in Japan , 1986 in North America and 1987 in Europe....
platform were the first video games to be packaged in any kind of keep case, and they were used in 100% of its game library. The vast majority of Sega Genesis games would come in a plastic keep case, but were later packaged in pressboard boxes, as a cost-cutting measure.
Before the standard, commonly used DVD case was invented, early CD-ROM based video games (such as Sega CD and early PlayStation
PlayStation
The is a 32-bit fifth-generation video game console first released by Sony Computer Entertainment in Japan on December 3, .The PlayStation was the first of the PlayStation series of consoles and handheld game devices. The PlayStation 2 was the console's successor in 2000...
titles) would often come in a taller keep case, which resembled a thicker and taller jewel case. These have been reputed to break very easily.
Today, all major console-based video game software is packaged in some sort of keep case, including Nintendo DS
Nintendo DS
The is a portable game console produced by Nintendo, first released on November 21, 2004. A distinctive feature of the system is the presence of two separate LCD screens, the lower of which is a touchscreen, encompassed within a clamshell design, similar to the Game Boy Advance SP...
cartridge titles, and Sony PSP titles.
Blu-ray discs and PlayStation 3 games come in a shorter and slightly thinner keep case than their predecessors. Blu-ray movie cases are almost always a transparent blue colour while PlayStation 3 games are clear transparent (opaque red for the "Greatest Hits" re-releases in North America).
Empty cases and do-it-yourself
In addition to the industrial usages reported above, empty keep cases are available at retail stores, which can serve for instance as a replacement for broken cases or for DVDs containing personal video recordings or data. Besides Amaray, common brands are Maxell, MemorexMemorex
Memorex began as a computer tape producer and expanded to become a major IBM plug compatible peripheral supplier. It is now a consumer electronics brand of Imation specializing in disk recordable media for CD and DVD drives, flash memory, computer accessories and other electronics.Established in...
, TDK
TDK
, formerly , is a Japanese company which manufactures electronic materials, electronic components, and recording and data-storage media, and markets them globally. Their motto is "Contribute to culture and industry through creativity"...
, Verbatim
Verbatim Corporation
Verbatim Americas, LLC is a US company that markets storage media and flash memory products. It is a subsidiary of Mitsubishi Chemical Holdings Corporation of Japan and is based in Charlotte, North Carolina.-History:...
, NexPak, US Digital Media. Some vendors, e.g. TDK and Infiniti
Infiniti (Medea)
Infiniti is a brand of recordable optical media, recordable CD-R, DVD-R, DVD+R, LightScribe and other backup storage media made by Medea International, a British company based in Scotland. The Infiniti brand name has been very successful in Europe, and has been selling since 1998.- Media codes...
, also sell recordable DVDs individually packed in keep cases.