TG: matriz (disco sonoro analog.)(por)
UP (é traduzido por): disco estampador (disco fonográfico)(spa)
UP (é traduzido por): disco estampador (negativo)(spa)
UP (é traduzido por): stamper (negative copy)(eng)
UP (é traduzido por): stamper (sound disc)(eng)
UP (variação de): carimbo (disco sonoro)(por)
TR (processo/parte de): disco sonoro(por)
UP (é traduzido por): disco estampador (disco fonográfico)(spa)
UP (é traduzido por): disco estampador (negativo)(spa)
UP (é traduzido por): stamper (negative copy)(eng)
UP (é traduzido por): stamper (sound disc)(eng)
UP (variação de): carimbo (disco sonoro)(por)
TR (processo/parte de): disco sonoro(por)
Definição do conceito
[POR] disco estampador (carimbo); cópia negativa (disco sonoro) ; estampador (disco sonoro) | disco estampador (carimbo); disco estampador (cópia negativa); estampador (disco); carimbo (disco) : Do disco matriz, é obtida uma cópia positiva, chamada disco mãe. Se este disco contém a informação correta o processo é repetido até se obterem mais oito discos "mãe". De cada uma das 8 cópias do "disco mãe" fazem-se duas cópias negativas, chamadas discos estampadores ou "carimbos". Este processo é repetido com o outro disco pai que representa o outro lado do disco final. | A partir do "disco estampador" (ou "carimbo") tiram-se as cópias positivas finais ou copias comerciais, por simples prensagem de uma pastilha quente de cloreto de polivinilo ou mais modernamente de poliéster, chamado o "donut", entre os dois carimbos, moldes estampadores ou matrizes correspondentes às duas faces do disco. Finalmente adiciona-se, por simples colagem, a etiqueta em cada face do disco, identificando o seu conteúdo. Esta cópia final é a que é vendida ao público. | FONTE: https://pt.wikipedia.org/wiki/Disco_de_vinil
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[SPA] disco estampador (negativo) (disco fonográfico) | disco estampador (negativo) : A partir de [matrices metálicas positivas, o "madres"] se creaban a su vez estampadores (negativos). Los estampadores producidos por las madres después de la separación se cromaban para obtener una superficie dura. Cada estampador era perforado en su centro. Los métodos utilizados incluyeron alinear el surco cerrado final con respecto a tres pasadores, o desplazar el borde del disco mientras se giraba hasta que se pudieran ver los surcos a través de un microscopio moviéndose uniformemente hacia el centro. Cualquiera de los dos métodos requería bastante habilidad y mucho esfuerzo para ser dominado. El punzón no solo realizaba el orificio central, sino que también conformaba un labio que se usaba para asegurar la matriz en la prensa. | A continuación, se recortaba el estampador a la medida y se lijaba en su parte posterior para asegurar la suavidad del acabado de las molduras y mejorar el contacto entre la estampadora y la matriz de prensa. Luego, el borde se presionaba hidráulicamente para formar otro labio con el fin de sujetar el borde hacia abajo en la prensa. Los estampadores se utilizaban en prensas hidráulicas para moldear los discos LP. Las ventajas de este sistema sobre el sistema más directo anterior incluían la capacidad de hacer una gran cantidad de registros rápidamente mediante el uso de múltiples matrices. Además, se podían producir más copias, ya que los estampadores podrían resultar dañados accidentalmente, pero rara vez se desgastarían. | FUENTE: https://es.wikipedia.org/wiki/Producci%C3%B3n_de_discos_fonogr%C3%A1ficos
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[ENG] stamper (sound disc); stamper (negative copy) (sound disc) | stamper (disc); stamper (negative copy) : Acetate discs are used for the production of records. Unlike ordinary vinyl records, which are quickly formed from lumps of plastic by a mass-production molding process, an acetate disc is created by using a recording lathe to cut an audio-signal-modulated groove into the surface of a lacquer-coated blank disc, a real-time operation requiring expensive, delicate equipment and expert skill for good results. The disc is then coated in metal, which is then peeled off to form a negative that will later be electroplated and peeled to create a mother (positive copy) which is then again electroplated and peeled to create negatives called stampers, which are then used as molds in a record press. | SOURCE:
https://en.wikipedia.org/wiki/Acetate_disc
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[ENG] stamper (negative copy) (sound disc) | stamper (negative copy) : [From a mother (positive copy)] stampers (negatives) would be formed. Producing mothers was similar to electroforming Masters, except the time allowed to turn-up to full current was much shorter and the heavier Mothers could be produced in as little as one hour and stampers (145 grams) could be made in 45 minutes. | ... | Stampers produced from the mothers after separating were chrome plated to provide a hard stain-free surface. Each stamper was next centre punched for the pin on the playback turntable. Methods used included aligning the final locked groove over three pins, or tapping the edge while rotating under the punch until the grooves could be seen (through a microscope) to move constantly towards the centre. Either method was quite skilled and took much effort to learn. The centre punch not only punched a hole, but formed a lip which would be used to secure the stamper into the press. | The stamper was next trimmed to size, and the back sanded smooth, to ensure a smooth finish to the mouldings, and improve contact between the stamper and the press die. The edge was then pressed hydraulically to form another lip to clamp the edge down on the press. The stampers would be used in hydraulic presses to mould the LP discs. The advantages of this system over the earlier more-direct system included ability to make a large number of records quickly by using multiple stampers. Also, more records could be produced from each master since stampers would eventually get damaged, but rarely wear out. | Since the master was the unique source of the positive, made to produce the stampers, it was considered a library item. Accordingly, copy positives, required to replace worn positives, were made from unused early stampers. These were known as copy shells, and were the physical equivalent of the first positive. | The "pedigree" of any record can be traced through the positive/stamper identities used, by reading the lettering found on the record run-out area. | SOURCE: https://en.wikipedia.org/wiki/Production_of_phonograph_records
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[ENG] stamper (sound disc) | published item | .../... | [2] Sound recordings generated as part of the (commercial) production process such as acetate masters, production masters, back up production masters (industry safety tapes), metal parts (mothers, masters, stampers, direct metal masters) and test pressings | | SOURCE : IASA Cataloguing Rules. Available at : https://www.iasa-web.org/cataloguing-rules/appendix-d-glossary Accessed: 10 set. 2022
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