{"id":18184,"date":"2016-05-06T12:15:56","date_gmt":"2016-05-06T12:15:56","guid":{"rendered":"https:\/\/vitrallsbonet.com\/els-deterioraments-mes-comuns-en-vidrieres\/"},"modified":"2016-05-06T12:15:56","modified_gmt":"2016-05-06T12:15:56","slug":"els-deterioraments-mes-comuns-en-vidrieres","status":"publish","type":"post","link":"https:\/\/vitrallsbonet.com\/ca\/els-deterioraments-mes-comuns-en-vidrieres\/","title":{"rendered":"Els deterioraments m\u00e9s comuns en vidrieres"},"content":{"rendered":"<h3>Introducci\u00f3<\/h3>\n<p>Aquest text recull els deterioraments m\u00e9s freq\u00fcents que es poden trobar en vidrieres. L&#8217;objectiu \u00e9s difondre aquest coneixement per a \u00fas de <strong>propietaris de col\u00b7leccions, gestors de patrimoni i conservadors-restauradors<\/strong> no especialitzats en aquest camp. La conservaci\u00f3 de vidrieres \u00e9s<!--more--> una especialitat poc coneguda amb materials i mecanismes molt allunyats d&#8217;altres camps de la restauraci\u00f3. Algunes especialitats tot i ser especialitats comparteixen punts comuns amb altres, per\u00f2 les analogies amb els vitralls s\u00f3n en general poc \u00fatils. Els vitralls s\u00f3n b\u00e9ns mobles per\u00f2 la majoria, molt al contrari d&#8217;altres b\u00e9ns, estan exposats a la intemp\u00e8rie i s\u00f3n el tancament dels edificis. En gaireb\u00e9 tots els casos el seu estat de conservaci\u00f3 s&#8217;ha de jutjar a gran dist\u00e0ncia ja que malauradament no es disposa de mitjans d&#8217;elevaci\u00f3 per diagnosticar-los. En aquests casos, l&#8217;experi\u00e8ncia del restaurador \u00e9s un factor de valor incalculable.<\/p>\n<p>El desconeixement d&#8217;aquest art sovint fa molt dif\u00edcil per al propietari o responsable de l&#8217;objecte jutjar l&#8217;estat de conservaci\u00f3 de la vidriera i establir la m\u00e9s m\u00ednima estrat\u00e8gia de conservaci\u00f3.<\/p>\n<p>Les vidriera \u00e9s un objecte compost de materials molt diferents, vidre, plom, grisalla i esmalt i els marcs i\/o morters que subjecten la vidriera a l&#8217;edifici.<\/p>\n<h2>Alteracions m\u00e9s comunes:<\/h2>\n<h3><strong>1. Alteracions del plom<\/strong><\/h3>\n<p>El perfil de plom a H forma una xarxa m\u00e9s o menys complexa que \u00e9s susceptible de patir diversos d\u00e9g\u00e2ts. Les actuacions majorit\u00e0ries solen centrar-se en la seva consolidaci\u00f3 i en cas de no resoldre&#8217;s amb la promptitud necess\u00e0ria acaben causant deterioraments irreversibles i fins i tot la p\u00e8rdua completa de part dels vitralls.<\/p>\n<ul>\n<li><strong>Curvatures dels plafons:<\/strong> \u00c9s un deteriorament molt com\u00fa i sol ser m\u00e9s senzill detectar-lo al costat exterior de la vidriera observant-la amb llum reflectida. Pot ser deguda a un assentament de lestructura encara que habitualment sassocia a altres alteracions, xarxa de plom trencada en diversos punts, mala disposici\u00f3 dels refor\u00e7os. En cas de ser una estructura s\u00f2lida al tacte podria no requerir cap intervenci\u00f3. \u00c9s un senyal d&#8217;alarma i cal consultar-ho a un especialista.<\/li>\n<li><strong>Fractures del plom:<\/strong> En funci\u00f3 de diversos factors, com la composici\u00f3 del material i la seva factura poden apar\u00e8ixer trencaments al plom. Generalment apareixen a les proximitats de les soldadures. \u00c9s un deteriorament greu i en cas de trobar-se de forma generalitzada per tota la xarxa de plom pot ser la causa del despreniment de part del plaf\u00f3. Aquestes fractures s\u00f3n visibles des de la proximitat, en cas de trobar-se a llocs de dif\u00edcil acc\u00e9s s\u00f3n indetectables.<\/li>\n<li><strong>Aspecte blanquin\u00f3s del plom:<\/strong> Aquesta alteraci\u00f3 \u00e9s la descomposici\u00f3 del plom met\u00e0l\u00b7lic en carbonat del plom. \u00c9s degut a aliatges de plom poc estables, en general ploms moderns que no s\u00f3n aliats. \u00c9s un material especialment t\u00f2xic i el conservador ha de prendre precaucions en la manipulaci\u00f3. Aquest deteriorament s&#8217;accelera amb la pres\u00e8ncia d&#8217;\u00e0cids org\u00e0nics per la qual cosa sol anar vinculat a l&#8217;\u00fas de silicones ac\u00e8tiques a la instal\u00b7laci\u00f3 de la vidriera o de l&#8217;envidrament de protecci\u00f3.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fractura-en-la-red-de-plomo-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-389\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fractura-en-la-red-de-plomo-vidriera-300x225.jpg\" alt=\"fractura-en-la-xarxa-de-plom-vidriera\" width=\"263\" height=\"197\"> <\/a>        <a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/alteraci%C3%B3n-plomo-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-390\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/alteraci%C3%B3n-plomo-vidriera-224x300.jpg\" alt=\"alteraci\u00f3-plom-vidriera\" width=\"146\" height=\"195\">  .  <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/aspecto-blanquecino-plomo-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-391\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/aspecto-blanquecino-plomo-vidriera-300x225.jpg\" alt=\"aspecte-blanquin\u00f3s-plom-vidriera\" width=\"263\" height=\"197\"><\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/deterioros-comunes-plomo-1.jpg\"><br \/>\n<\/a><em>Deterioraments comuns de la xarxa de plom<\/em><\/p>\n<h3><strong>2. Residus externs i brut\u00edcia<\/strong><\/h3>\n<p>Aquest \u00e9s un apartat complex i en alguns casos es deixa la neteja de les vidrieres a mans de personal sense formaci\u00f3 espec\u00edfica no nom\u00e9s en vidrieres sin\u00f3 en conservaci\u00f3-restauraci\u00f3. La part principal i la m\u00e9s dif\u00edcil \u00e9s detectar quines parts s\u00f3n residus externs i que part \u00e9s fruit de l&#8217;envelliment natural dels materials. L&#8217;objectiu de les neteges \u00e9s retirar els residus externs que puguin influir en la conservaci\u00f3 del vitrall i no tant recuperar translucidesa. Les neteges s\u00f3n processos irreversibles que poden ser molt perillosos per a la integritat de la vidriera i s&#8217;haurien de deixar sempre en mans de t\u00e8cnics especialment formats.<\/p>\n<p>Entre els residus m\u00e9s habituals que trobem: acumulaci\u00f3 de pols, deposicions d&#8217;aus, teranyines, restes de sutge de veles, dip\u00f2sits calcaris, taques d&#8217;\u00f2xid provinents de marcs i refor\u00e7os, tamb\u00e9 taques de residus com a restes de pintures, vernissos originats en treballs realitzats a la proximitat de la vidriera.<\/p>\n<p>La neteja amb m\u00e8todes aquosos hauria d&#8217;evitar-se si no \u00e9s realitzada per un professional.<\/p>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/limpieza-mantenimiento-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-394\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/limpieza-mantenimiento-vidriera-300x224.jpg\" alt=\"neteja-manteniment-vidriera\" width=\"266\" height=\"198\">   <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/limpieza-de-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-393\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/limpieza-de-vidriera-300x225.jpg\" alt=\"neteja-de-vidriera\" width=\"264\" height=\"199\">   <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/acumulaci%C3%B3n-restos-polvo-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-392\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/acumulaci%C3%B3n-restos-polvo-vidriera-300x225.jpg\" alt=\"acumulaci\u00f3-restes-pols-vidriera\" width=\"264\" height=\"199\"><\/a><\/p>\n<h3><strong>3. Vidre<\/strong><\/h3>\n<p>El vidre \u00e9s evidentment un material fr\u00e0gil, per\u00f2 paradoxalment \u00e9s extraordin\u00e0riament durador si es conserva en condicions favorables. La majoria de composicions de vidres s\u00f3n tamb\u00e9 molt duradores i inalterables.<\/p>\n<p><strong>Deterioraments qu\u00edmics del vidre<\/strong><\/p>\n<p>Els deterioraments qu\u00edmics al vidre s\u00f3n deguts a composicions qu\u00edmiques poc estables, com per exemple percentatges inferiors al 60% de Si o baixa pres\u00e8ncia de Ca. Aquests s&#8217;acceleren en funci\u00f3 de l&#8217;agressivitat de l&#8217;entorn a qu\u00e8 estan exposats. L&#8217;estabilitat dels vidres en funci\u00f3 de la composici\u00f3 \u00e9s un tema molt complex. Microsc\u00f2picament la poca estabilitat dels vidres es manifesta amb fen\u00f2mens molt diferents, crostes blanquinoses, picada de la superf\u00edcie, irisacions, micro fractures a tot el material, opacitat. Les condicions de conservaci\u00f3 hostils seria el cas d&#8217;entorns on hi hagu\u00e9s condensacions freq\u00fcents o humitats relatives molt altes.<\/p>\n<p><strong>Fractures<\/strong><\/p>\n<p>Les fractures poden ser causades per molts motius. Poden ser degudes a la pobre realitzaci\u00f3 de les peces, a vidrieres mal executades en qu\u00e8 el pes no es distribueix homog\u00e8niament o poden ser degudes a factors externs, com ara l&#8217;impacte d&#8217;objectes, ocells, impactes fortu\u00efts o vandalisme. En cas de xarxes de plom alterades solen causar la fractura d&#8217;algunes peces. En el cas de vidrieres exposades a canvis de temperatura bruscos, \u00e9s freq\u00fcent trobar fractures causades pel contrast t\u00e8rmic.<\/p>\n<p><strong>Canvis de coloraci\u00f3<\/strong><\/p>\n<p>Algunes composicions de vidre poden canviar de coloraci\u00f3 a causa del canvi d&#8217;oxidaci\u00f3 dels \u00f2xids met\u00e0l\u00b7lics que donen color a la massa v\u00edtria. \u00c9s freq\u00fcent el canvi de color transparent a color violeta p\u00e0l\u00b7lid.<\/p>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fractura-vidrio-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-396\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fractura-vidrio-vidriera-300x224.jpg\" alt=\"fractura-vidre-vidriera\" width=\"258\" height=\"192\"><\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/rotura-grieta-soporte.jpg\" target=\"_blank\" rel=\"noopener\">   <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-397\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/rotura-grieta-soporte-300x225.jpg\" alt=\"trencament-esquerda-suport\" width=\"255\" height=\"192\"> <\/a>  <a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/apertura-rotura-vidrio.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-395\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/apertura-rotura-vidrio-300x225.jpg\" alt=\"obertura-trencament-vidre\" width=\"256\" height=\"192\"><\/a><\/p>\n<p><em>Diversos casos de fractures<\/em><\/p>\n<h3><strong>4. Alteracions de les pintures<\/strong><\/h3>\n<p>La majoria de vitralls tenen vidres pintats que es couen en forns per fixar-los de forma gaireb\u00e9 permanent. Aquestes pintures poden ser depenent de la seva composici\u00f3 grises, esmalts, grocs de plata tots ells amb propietats molt diferents. Els seus mecanismes de degradaci\u00f3 s\u00f3n molt complexos i es poden desenvolupar fins a la p\u00e8rdua gaireb\u00e9 completa de la pintura. En cas de detectar-se coloraci\u00f3 blanquinosa, la p\u00e8rdua de pintura en flocs o la desaparici\u00f3 de parts de la pintura, truqui a un especialista.<\/p>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/pintura-vidriera-conservacion.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-400\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/pintura-vidriera-conservacion-225x300.jpg\" alt=\"pintura-vidriera-conservacio\" width=\"194\" height=\"259\">   <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/degradacion-calidad-pintura.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-398\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/degradacion-calidad-pintura-300x225.jpg\" alt=\"degradaci\u00f3-qualitat-pintura\" width=\"346\" height=\"259\">   <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/perdida-calidad-tonos-colores-dibujo.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-399\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/perdida-calidad-tonos-colores-dibujo-200x300.jpg\" alt=\"perduda-qualitat-tons-colors-dibuix\" width=\"174\" height=\"261\"><\/a><\/p>\n<h3><strong>5. Marcs i refor\u00e7os<\/strong><\/h3>\n<p>L&#8217;estructura de plom i vidre va sempre subjecta per un marc perimetral tradicionalment de ferro i disposa de refor\u00e7os de passam\u00e0 o de vareta de secci\u00f3 circular que fixen els plafons al marc. Aquests elements s\u00f3n m\u00e9s susceptibles a la corrosi\u00f3 que el plom i la seva oxidaci\u00f3 pot arribar a causar danys a la vidriera. El m\u00e9s com\u00fa \u00e9s la taca d&#8217;\u00f2xid de la superf\u00edcie propera a aquests. En casos extrems es pot corroir completament i deixar d&#8217;exercir la seva funci\u00f3. Cal estar atents a les filtracions que puguin accelerar aquest fenomen.<\/p>\n<p><strong>Pedra i morters<\/strong><\/p>\n<p>En el cas de la instal\u00b7laci\u00f3 m\u00e9s tradicional, a les esgl\u00e9sies, les vidrieres s&#8217;instal\u00b7len en traceries i mainells m\u00e9s o menys complexos. Aquestes estructures no s\u00f3n completament r\u00edgides i els seus lleus moviments poden causar fractures als vidres i corbar els plafons.<\/p>\n<p>En alguns casos els morters s&#8217;esquerden i es desprenen deixant d&#8217;exercir la seva funci\u00f3 de subjecci\u00f3.<\/p>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/grieta-mortero-sujeci%C3%B3n.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-401\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/grieta-mortero-sujeci%C3%B3n-300x224.jpg\" alt=\"esquerda-morter-subjecci\u00f3\" width=\"298\" height=\"222\">          <\/a><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/marco-deterioro-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-402\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/marco-deterioro-vidriera-300x225.jpg\" alt=\"marc-deteriorament-vidriera\" width=\"300\" height=\"225\"><\/a><\/p>\n<h3><strong>6. Qu\u00e8 cal fer en cas d&#8217;accident<\/strong><\/h3>\n<p>En cas d&#8217;accident fortu\u00eft, ser\u00e0 de gran ajuda una actuaci\u00f3 diligent despr\u00e9s d&#8217;aquest. Assegurar l&#8217;espai on es poden desprendre parts del vidre. Un cop fet aix\u00f2, recollir els fragments despresos per molt insignificants que puguin semblar. En cas que sigui impossible que ho faci el conservador, l&#8217;ha de fer el mateix responsable de la conservaci\u00f3 de l&#8217;objecte. Aquests fragments poden ajudar en gran mesura a la restauraci\u00f3 de lobjecte. Fotografiar la vidriera com m\u00e9s aviat millor per deixar const\u00e0ncia de l&#8217;accident, aquestes fotografies seran \u00fatils a l&#8217;asseguran\u00e7a que pugui cobrir les despeses generades a l&#8217;accident. Trucar com m\u00e9s aviat millor a un professional capa\u00e7 de confeccionar un pressupost, assegurar la vidriera per evitar que els danys proliferin, i comen\u00e7ar una intervenci\u00f3 de <a href=\"https:\/\/vitrallsbonet.com\/servicios\/restauracion-vidrieras\/\">conservaci\u00f3 restauraci\u00f3<\/a> . Una an\u00e0lisi de l&#8217;accident pot ensenyar quines han estat les causes i minimitzar-ne els riscos amb mesures senzilles.<\/p>\n<p><a href=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fragmentos-conservaci%C3%B3n-accidente-vidriera.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-404 aligncenter\" src=\"https:\/\/vitrallsbonet.com\/wp-content\/uploads\/2016\/05\/fragmentos-conservaci%C3%B3n-accidente-vidriera-266x300.jpg\" alt=\"fragments-conservaci\u00f3-accident-vidriera\" width=\"191\" height=\"215\"><\/a><\/p>\n<h3><strong>7. Quins punts cal observar en la revisi\u00f3 de l&#8217;estat de conservaci\u00f3 de la vidriera<\/strong><\/h3>\n<p>Una inspecci\u00f3 rutin\u00e0ria i programada peri\u00f2dicament hauria de fer un seguiment de tots els elements que puguin donar informaci\u00f3 sobre l&#8217;estat de conservaci\u00f3 de la vidriera. Com sovint es realitza a dist\u00e0ncia no nom\u00e9s cal observar l&#8217;objecte sin\u00f3 tamb\u00e9 el seu entorn m\u00e9s proper. S&#8217;hauria d&#8217;observar.<\/p>\n<ul>\n<li>No hi ha curvatures als plafons.<\/li>\n<li>No hi ha filtracions daigua.<\/li>\n<li>No hi ha p\u00e8rdues de pintura a les parts pintades.<\/li>\n<li>No hi ha fractures als vidres.<\/li>\n<li>Els morters o massilles estan al seu lloc sense esquerdes ni despreniments.<\/li>\n<li>El plom no t\u00e9 coloraci\u00f3 blanca ni fractures.<\/li>\n<\/ul>\n<p>Per a qualsevol dubte o informaci\u00f3 ens podeu contactar a <a href=\"mailto:info@vitrallsbonet.com\">info@vitrallsbonet.com<\/a><\/p>\n<p style=\"text-align: left;\">Per rebre m\u00e9s articles com aquest subscriviu-vos al nostre butllet\u00ed:<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introducci\u00f3 Aquest text recull els deterioraments m\u00e9s freq\u00fcents que es poden trobar en vidrieres. L&#8217;objectiu \u00e9s difondre aquest coneixement per a \u00fas de propietaris de col\u00b7leccions, gestors de patrimoni i conservadors-restauradors no especialitzats en aquest camp. La conservaci\u00f3 de vidrieres \u00e9s<\/p>\n","protected":false},"author":4,"featured_media":17791,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[131],"tags":[],"servicios":[],"vidrieras":[],"class_list":["post-18184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vidrieres-modernes-ca"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Els deterioraments m\u00e9s comuns en vidrieres - Vitralls Bonet<\/title>\n<meta name=\"description\" content=\"Es discuteixen els deterioraments m\u00e9s freq\u00fcents que es poden trobar a les vidrieres. 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