[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-648090-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-648090-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","caring-for-blueprints-and-cyanotypes","Caring For Blueprints And Cyanotypes","","Covers care practices for blueprints and cyanotypes, including their historical context, typical appearance, and common deterioration mechanisms. Explains how acidic, uncoated paper and iron-salt chemistry affect brittleness, foxing, and fading, and notes that alkaline conditions and light exposure reduce image density. Provides storage and housing guidance using unbuffered, neutral-pH materials, appropriate folders and boxes, and handling rules to prevent bending, folding, rolling, or unsupported movement while enabling safe viewing with rigid support.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/caring-for-blueprints-and-cyanotypes/648090/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/caring-for-blueprints-and-cyanotypes/648090.png","ImageObject",300,407,{"name":42,"@type":43},"Aditya","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-09","2026-10-23",true,{"@type":52,"interactionType":53,"userInteractionCount":30},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What causes blueprints and cyanotypes to become brittle or show staining?","Question",{"text":62,"@type":63},"They are produced using light-sensitive iron salts that lodge deep in uncoated paper. Their acidic nature makes them frequently brittle and prone to brown staining or foxing.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How do alkaline environments and light affect image quality?",{"text":67,"@type":63},"Alkaline (buffered) environments cause loss of image detail and density, often progressing from yellowish-brown to fading to white. Exposure to light can also cause fading; original items should not be used in exhibitions.",{"name":69,"@type":60,"acceptedAnswer":70},"What is the recommended way to house and store blueprints or cyanotypes?",{"text":71,"@type":63},"Store them flat in unbuffered, neutral-pH folders within metal map cases or unbuffered boxes, using high alpha cellulose and low-lignin materials. Keep each item in its own unbuffered folder when possible and avoid buffered or unsuitable housing materials.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},648090,1792792179,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & 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in 1842.It was first used torecord herbarium specimens without benefit of acamera.The specimens were placed directlyagainst sheets of paper impregnated withchemicals and exposed to light.Thesecameraless images were most common between1842 and 1860,although some later artists andscientists also produced them.  \nBetween 1880 and the 1920s the process becamepopular for producing prints from photographicnegatives called cyanotypes(cyan means blue).The most common use of the process occurredbetween 1890 and the present,when it was usedfor producing copies of architectural andengineering drawings,called blueprints.Manyarchitects of the last hundred years usedblueprints to reproduce their working drawings,and many amateur and professional  \nphotographers used cyanotypes to produce draftcopies of photographic prints.  \n# Appearance and Deterioration\n\nBoth blueprints and cyanotypes have bright blueimage detail with white highlights on smoothmatte-surfaced uncoated paper.However,if theimages were photographically reversed,theymay have white image detail with bluehighlights.These reversed images aresometimes labeled with their alternative namesferroprussiate prints or pellet process prints orthe technical process name photogram.  \nBlueprints most often reproduce architectural orengineering drawings,diagrams,and plans.They are often discovered in construction files,oversized map cases,and maintenance records.Cyanotypes are photographs usually housed  \nPARKSERVICEConserveConserve OGram OGramDEPAFTMENT OF\\#NTEPiOR  \nunframed with other photographic prints.When blueprints or cyanotypes are made withoutcameras they may also be labeled as photo-grams.These cameraless images are mostcommonly a ghostly white reproduction of plantspecimens or objects on a brilliant bluebackground—a reverse image of mostcyanotypes—housed with photographs orscientific illustrations.  \nBoth blueprints and cyanotypes are producedusing light-sensitive iron salts that lodge deep inthe uncoated paper.The paper fibers ofblueprints and cyanotypes are visible under30-power magnification.Due to their acidicnature,cyanotypes and blueprints are frequentlybrittle and may have some brown staining,orfoxing,that results from mold growth aroundminute metal particles in the paper.Despitethese problems,blueprint and cyanotype imagesare usually stable and can maintain a surprisinglybright image.  \nBlueprint and cyanotype images commonly fadewhen:  \n·placed in an alkaline (buffered)environment.An alkaline or buffered environment causesblueprints and cyanotypes to lose image detailand density.The images first turn yellowish-brown before eventually fading to white.  \n·exposed to light.Original blueprints andcyanotypes should not be used in exhibitions.  \nNOTE:Surprisingly,images that have faded orlost image detail due to light exposure canrecover image density over time if they arestored in the dark in a neutral,non-bufferedenvironment.  \n# Housing Blueprints and Cyanotypes\n\nSince blueprints and cyanotypes can be damagedby both light and an alkaline environment,blueprints and oversize cyanotypes should behoused flat in unbuffered,neutral-pH folders,within metal map cases or within shallowsolander-type unbuffered boxes.Cyanotypes thatare 8\"x10\"or less may be housed upright ontheir edge within an unbuffered,neutral-pH four-flap sleeve,then in an unbuffered folder,andfinally in boxes like other photographs.Useunbuffered folder stock that is high alphacellulose and low-lignin.  \nBecause of their brittleness,blueprints andcyanotypes tear easily.Each blueprint orcyanotype should be housed in its own individualfolder that is unbuffered,high alpha cellulose,and low-lignin.If,for reasons of economy,thisis not possible,use unbuffered neutral-pH tissuepaper to separate individual images from eachother and from their folder.Never usebuffered,glassine,or ground wood housingmaterials.Avoid placing more","cbCaiuxxKKxxSyja","https://ap.wps.com/l/cbCaiuxxKKxxSyja","pdf",1394259,"English","# Caring For Blueprints And Cyanotypes\n# Appearance and Deterioration\n# Housing Blueprints and Cyanotypes\n# Plastic Sleeves and Encapsulation\n# Handling","[{\"question\":\"What causes blueprints and cyanotypes to become brittle or show staining?\",\"answer\":\"They are produced using light-sensitive iron salts that lodge deep in uncoated paper. Their acidic nature makes them frequently brittle and prone to brown staining or foxing.\"},{\"question\":\"How do alkaline environments and light affect image quality?\",\"answer\":\"Alkaline (buffered) environments cause loss of image detail and density, often progressing from yellowish-brown to fading to white. Exposure to light can also cause fading; original items should not be used in exhibitions.\"},{\"question\":\"What is the recommended way to house and store blueprints or cyanotypes?\",\"answer\":\"Store them flat in unbuffered, neutral-pH folders within metal map cases or unbuffered boxes, using high alpha cellulose and low-lignin materials. Keep each item in its own unbuffered folder when possible and avoid buffered or unsuitable housing materials.\"}]","Caring For Blueprints And Cyanotypes | PDF"]