TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

[A] process that impregnates paper with an alkaline reserve to neutralize the active acid in the paper substrate and act as a buffer to neutralize acids produced in the future.  2, record 1, English, - deacidification

Record number: 1, Textual support number: 1 CONT

The development of a viable mass deacidification process has long been considered the answer to the problems of conservation in the library field. Acid, inherent in the untreated wood pulp, introduced into the paper in the manufacturing process, or caused from contact with polluted air, breaks the links in the cellulose polymer chains causing the fibers to break down; the paper becomes discolored and brittle, losing both permanence and durability very quickly.... Deacidification does arrest the acid attack and, if adequate buffers are left in the paper, prevents it from recurring, but does not restore embrittled and discolored books to their original state.  3, record 1, English, - deacidification

Record number: 1, Textual support number: 1 OBS

Deacidification lengthens the life expectancy of paper several times its ordinary life.  2, record 1, English, - deacidification

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

[Processus] complexe qui permet, grâce à un agent alcalin (gazeux ou liquide), de neutraliser les acides présents dans le papier et de fournir une réserve alcaline dans le but de prolonger la durée de vie des documents.  2, record 1, French, - d%C3%A9sacidification

Record number: 1, Textual support number: 1 CONT

[Toute] restauration devrait permettre d'obtenir une stabilisation mécanique et chimique ainsi qu'une meilleure lisibilité du document, et permettre d'en faciliter la consultation et la mise en exposition. Quelques-uns des traitements, les plus courants, sont le dépoussiérage, le nettoyage à sec, le marouflage (action qui consiste à coller du papier ou de la toile sur un support pour le consolider), le traitement aqueux, la désacidification et la pose de renforts.  3, record 1, French, - d%C3%A9sacidification

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Instead, the damaged areas of the manuscript were repaired and strengthened locally. Interleaving pages, impregnated with one of the tested antioxidants and a deacidification agent, were added to the manuscript during rebinding to delay migration of corrosive compounds.  1, record 2, English, - damaged%20area

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Les parties endommagées du manuscrit ont plutôt été réparées et renforcées localement. Au moment de relier à nouveau le manuscrit, des pages imprégnées de l'un des antioxydants mis à l'essai et d'un agent désacidifiant ont été intercalées afin de retarder la migration des composés corrosifs.  1, record 2, French, - partie%20endommag%C3%A9e

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Interleaving pages, impregnated with one of the tested antioxidants and a deacidification agent, were added to the manuscript during rebinding to delay migration of corrosive compounds.  1, record 3, English, - deacidification%20agent

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Au moment de relier à nouveau le manuscrit, des pages imprégnées de l'un des antioxydants mis à l'essai et d'un agent désacidifiant ont été intercalées afin de retarder la migration des composés corrosifs.  1, record 3, French, - agent%20d%C3%A9sacidifiant

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A chemical compound having the formula MgO which appears under the form of a noncombustible, white, alkaline powder, either light or heavy depending upon whether it is prepared by heating magnesium carbonate or the basic magnesium carbonate, is slightly soluble in water, soluble in acids and ammonium salt solutions, insoluble in alcohol, combines with water to form magnesium hydroxide, occurs naturally as the mineral periclase, is derived(1) by calcining magnesium carbonate or magnesium hydroxide,(2) by treating magnesium chloride with lime and heating or by heating it in air,(3) from seawater via the hydroxide, and is used as an inorganic rubber accelerator, a polycrystalline ceramic for aircraft windshields, in refractories, especially for steel furnace linings, for electrical insulation, in fertilizers, oxychloride and oxysulfate cements, paper manufacture, pharmaceuticals and cosmetics, semiconductors, for the removal of sulfur dioxide from stack gases and as a feed additive and in the food industry(mainly for the deacidification of butter, cooa, and some canned or frozen foods).  7, record 4, English, - magnesium%20oxide

Record number: 4, Textual support number: 1 OBS

Two forms are produced, one termed "Light," a fluffy material prepared by a relatively low-temperature dehydration of the hydroxide, the other termed "Heavy," a dense material made by high-temperature furnacing of the oxide after it has been formed from the carbonate or hydroxide.  7, record 4, English, - magnesium%20oxide

Record number: 4, Textual support number: 2 OBS

Also known under a large number of commercial designations, among which: Akri-Mag; Anima; Granmag; Magchem 100; Magox; Magox 85; Marmag; Oxymag; seawater magnesia.  7, record 4, English, - magnesium%20oxide

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

Poudre alcaline blanche utilisée principalement pour désacidifier le beurre, le cacao, certaines denrées en boîte ou congelées.  4, record 4, French, - oxyde%20de%20magn%C3%A9sium

Record number: 4, Textual support number: 2 OBS

[On distingue notamment la] magnésie calcinée légère, ou magnésie française, et la magnésie calcinée lourde, ou magnésie anglaise [...]  5, record 4, French, - oxyde%20de%20magn%C3%A9sium

Record number: 4, Textual support number: 3 OBS

Formule chimique : MgO  6, record 4, French, - oxyde%20de%20magn%C3%A9sium

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Preventive preservation refers to a specific set of non-intrusive preservation actions undertaken without actual physical intervention or chemical treatment of archival records. Preventive preservation attempts to prevent or halt deterioration or retard its progress, or manufactures a potential surrogate through certain copying techniques that maintain the copied archival record unchanged. Preventive preservation is not repair, deacidification or migration, which are active interventions that affect the record.  2, record 5, English, - preventive%20preservation

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

La préservation préventive se dit pour une série précise de mesures non radicales de préservation entreprises sans faire subir de traitement physique ni chimique aux documents d’archives. La préservation préventive tente d’empêcher les documents de se détériorer ou interrompt ou retarde le processus de détérioration, ou fabrique un éventuel substitut grâce au recours à certaines techniques de reproduction qui permettent de conserver le document d’archives reproduit inchangé. La préservation préventive n’a rien à voir avec la réparation, la désacidification ni la migration qui sont des interventions actives qui apportent des modifications au document.  2, record 5, French, - pr%C3%A9servation%20pr%C3%A9ventive

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

La neutralisation a pour objet de traiter l'huile démucilaginée par une solution de soude en vue d'en retirer les acides gras libres.  3, record 6, French, - d%C3%A9sacidification

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

An important improvement in the Wei T’o system was the replacement of the effective deacidification agent, magnesium methoxide, by methoxy magnesium methyl carbonate(mmmc). This replacement resulted in the reduction of several undesirable side effects such as a white deposit on the surface of the treated paper and clogging of the spray guns.  4, record 7, English, - methoxy%20magnesium%20methyl%20carbonate

Record number: 7, Textual support number: 2 CONT

Challenges in mass deacidification [of paper].... The first deacidification solution formula used the specially blended gas cfcs 12/13 to disperse the methoxy magnesium methyl carbonate(MMMC).  5, record 7, English, - methoxy%20magnesium%20methyl%20carbonate

Record number: 7, Textual support number: 1 OBS

MMMC; mmmc: These might be in-house or non-recognized abbreviations; not to be used alone, to avoid any risk of confusion. y  6, record 7, English, - methoxy%20magnesium%20methyl%20carbonate

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Plusieurs méthodes de désacidification de masse ont été proposées au cours des deux dernières décennies et certains systèmes font actuellement l'objet de travaux de développement. Cependant, le seul procédé appliqué avec succès sur une période prolongée est celui de la Bibliothèque nationale et des Archives nationales, le procédé Wei T'o. Ce procédé consiste à saturer les livres d'une solution de carbonate méthylique de méthoxymagnésium (MMMC) dans un mélange de fréons, puis à laisser le solvant s'évaporer. La solution alcaline de MMMC neutralise d'abord l'acide contenu dans le papier, puis le résidu alcalin laissé par l'évaporation du solvant forme, jusqu'à son épuisement, un tampon empêchant l'acidification du papier.  3, record 7, French, - carbonate%20m%C3%A9thylique%20de%20m%C3%A9thoxymagn%C3%A9sium

Record number: 7, Textual support number: 2 CONT

Des défis en désacidification de masse. [...] La première formule de la solution de désacidification employait comme gaz le mélange spécial cfc 12/113 pour disperser le carbonate méthylique de méthoxy magnésium (CMMM).  4, record 7, French, - carbonate%20m%C3%A9thylique%20de%20m%C3%A9thoxymagn%C3%A9sium

Record number: 7, Textual support number: 1 OBS

MMMC; CMMM : abréviations non officielles; ne pas les utiliser seules, pour éviter tout risque de confusion.  5, record 7, French, - carbonate%20m%C3%A9thylique%20de%20m%C3%A9thoxymagn%C3%A9sium

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 OBS

deacidify: to remove acid from: reduce the acidity (as by neutralization).  2, record 8, English, - disacidification

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Élimination plus ou moins complète, généralement par rinçage, de l'acide contenu dans un textile. Ce terme n'est pas toujours synonyme de neutralisation. [Définition normalisée par l'AFNOR et reproduite avec son autorisation.]  3, record 8, French, - d%C3%A9sacidage

Record number: 8, Textual support number: 1 OBS

désacidage : terme normalisé par l'AFNOR.  4, record 8, French, - d%C3%A9sacidage

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Deacidification and alkaline buffering can be used to neutralize the acid in newsprint and protect it against atmospheric pollution.  1, record 9, English, - alkaline%20buffering

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 OBS

Termes tirés de la partie III du Budget des dépenses 1985-1986, Bibliothèque nationale du Canada.  2, record 10, French, - d%C3%A9sacidification%20massive

Record 10,  Textual support,  Spanish