A tweeter or treble speaker is a special type of loudspeaker that is designed to produce high audio frequencies, typically up to 100 kHz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs, after which low-frequency drivers are named (woofers).
The United States five-dollar bill (US$5) is a denomination of United States currency. The current $5 bill features U.S. president Abraham Lincoln and the Great Seal of the United States on the front and the Lincoln Memorial on the back. All $5 bills issued today are Federal Reserve Notes. As of December 2018, the average life of a $5 bill in circulation is 4.7 years before it is replaced due to wear. Approximately 6% of all paper currency produced by the U.S. Treasury's Bureau of Engraving and Printing in 2009 were $5 bills.
Lamination is the technique/process of manufacturing a material in multiple layers, so that the composite material achieves improved strength, stability, sound insulation, appearance, or other properties from the use of the differing materials, such as plastic. A laminate is a layered object or material assembled using heat, pressure, welding, or adhesives. Various coating machines, machine presses and calendering equipment are used.
Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards. The main goal of security printing is to prevent forgery, tampering, or counterfeiting. More recently many of the techniques used to protect these high-value documents have become more available to commercial printers, whether they are using the more traditional offset and flexographic presses or the newer digital platforms. Businesses are protecting their lesser-value documents such as transcripts, coupons and prescription pads by incorporating some of the features listed below to ensure that they cannot be forged or that alteration of the data cannot occur undetected.
Microprinting is the production of recognizable patterns or characters in a printed medium at a scale that typically requires magnification to read with the naked eye. To the unaided eye, the text may appear as a solid line. Attempts to reproduce by methods of photocopy, image scanning, or pantograph typically translate as a dotted or solid line, unless the reproduction method can identify and recreate patterns to such scale. Microprint is predominantly used as an anti-counterfeiting technique, due to its inability to be easily reproduced by widespread digital methods.
A label is a piece of paper, plastic film, cloth, metal, or other material affixed to a container or product, on which is written or printed information or symbols about the product or item. Information printed directly on a container or article can also be considered labelling.
The Canadian one-hundred-dollar note is one of five banknotes of the Canadian dollar. It is the highest-valued and least-circulated of the notes since the thousand-dollar note was gradually removed from circulation starting in 2000.
The Portrait Series of currency notes is the fourth and current set of notes to be issued for circulation in Singapore. It was first introduced on 9 September 1999 by the Board of Commissioners of Currency, Singapore (BCCS), whose role was since taken over by the Monetary Authority of Singapore (MAS) post-merger.
A bookmark is a thin marking tool, commonly made of card, leather, or fabric, used to keep track of a reader's progress in a book and allow the reader to easily return to where the previous reading session ended. Alternate materials for bookmarks are paper, metals like silver and brass, silk, wood, cord (sewing), and plastic. Some books may have one or more bookmarks made of woven ribbon sewn into the binding. Furthermore, other bookmarks incorporate a page-flap that enables them to be clipped on a page.
The manufacture of textiles is one of the oldest of human technologies. To make textiles, the first requirement is a source of fiber from which a yarn can be made, primarily by spinning. The yarn is processed by knitting or weaving, which turns it into cloth. The machine used for weaving is the loom. For decoration, the process of colouring yarn or the finished material is dyeing. For more information of the various steps, see textile manufacturing.
Novelty yarns include a wide variety of yarns made with unusual features, structure or fiber composition such as slubs, inclusions, metallic or synthetic fibers, laddering and varying thickness introduced during production. Some linens, wools to be woven into tweed, and the uneven filaments of some types of silk are allowed to retain their normal irregularities, producing the characteristic uneven surface of the finished fabric. Man-made fibres, which can be modified during production, are especially adaptable for special effects such as crimping and texturizing.
Security paper is a paper used in security printing that incorporates features that can be used to identify or authenticate a document as original, e.g., watermarks or invisible fibres in paper, or features that demonstrate tamper evidence when fraud is attempted, e.g., to remove or alter print such as amounts or signatures on a cheque. Examples of this kind of papers are used for banknotes and used for identification such as passports and certificates, such as birth certificates and different types of academic and qualification certificates, as well as government documents, e.g., voting ballots and tax strips. This also extends to personal and business checks, stock certificates, certificates issued by financial institutions and sensitive government-issued documents. The main use of security paper is to stop people from counterfeiting.
The 500 krooni banknote is a denomination of the Estonian kroon, the former currency of Estonia. Carl Robert Jakobson (1841–1882), who was an Estonian politician, publisher, writer and promoter of agriculture, is featured on the front side of the bill, which is why the 500 krooni bill is often called a "Jakobson".
A photocopier is a machine that makes copies of documents and other visual images onto paper or plastic film quickly and cheaply. Most modern photocopiers use a technology called xerography, a dry process that uses electrostatic charges on a light-sensitive photoreceptor to first attract and then transfer toner particles onto paper in the form of an image. The toner is then fused onto the paper using heat, pressure, or a combination of both. Copiers can also use other technologies, such as inkjet, but xerography is standard for office copying.
Banknotes of the euro, the common currency of the eurozone, have been in circulation since the first series was issued in 2002. They are issued by the national central banks of the Eurosystem or the European Central Bank. The euro was established in 1999, but "for the first three years it was an invisible currency, used for accounting purposes only, e.g. in electronic payments". In 2002, notes and coins began to circulate. The euro rapidly took over from the former national currencies and slowly expanded around the European Union.
The ten euro note (10 €) is the second-lowest value euro banknote and has been used since the introduction of the euro in 2002. The note is used in the 25 countries which have it as their sole currency ; with a population of about 343 million. In July 2024, there were approximately 3 055 000 000 ten euro banknotes in circulation around the eurozone. It is the fourth most widely circulated denomination, accounting for 10.2% of the total banknotes. Estimates suggest that the average life of a ten euro banknote is about 1.5 years before it is replaced due to wear.
The twenty euro note (€20) is the third-lowest value euro banknote and has been used since the introduction of the euro in 2002. The note is used by the 25 countries and a population of 343 million as their sole currency, with 23 legally adopting it. In July 2024, there were approximately 4,818,000,000 twenty euro banknotes in circulation around the eurozone. It is the second most widely circulated denomination, accounting for 16.3% of the total banknotes. Estimates suggest that the average life of a twenty euro banknote is about two years before it is replaced due to wear.
The fifty euro note (€50) is one of the middle value euro banknotes and has been used since the introduction of the euro in 2002. The note is used by some 343 million Europeans and in the 25 countries which have the euro as their sole currency. In July 2024, there were about 14,712,000,000 fifty euro banknotes in circulation in the eurozone. It is by far the most widely circulated denomination, accounting for almost half (49.0%) of the total banknotes. Estimates suggest that the average life of a fifty euro banknote is about four years before it is replaced due to wear.
The Bank of England £20 note is a sterling banknote. It is the second-highest denomination of banknote currently issued by the Bank of England. The current polymer notes, first issued on 5 June 2024, bears the image of King Charles III on the obverse. The other note first issued on 20 February 2020, bears the image of the late Queen Elizabeth II on the obverse and the image of painter J. M. W. Turner on the reverse. It replaced the cotton paper note featuring a portrait of economist Adam Smith, first issued in 2007.
A diffractive optically variable image device (DOVID) is a type of optical variable device; a security feature based on visual effects created by diffraction. The acronym was coined by Ian Lancaster of Reconnaissance International in 1995. He pointed out that the security print industry was wary of holograms and similar diffractive devices because they were used as decorative, promotional and toy items, proposing the use of DOVID as a means to differentiate security diffractive optical devices from these other uses.
