{"meta":{"version":"2.1","_links":{"self":{"href":"https://api.vam.ac.uk/v2/object/O98775"},"collection_page":{"href":"https://collections.vam.ac.uk/item/O98775/"}},"images":null,"see_also":null},"record":{"systemNumber":"O98775","accessionNumber":"161-1944","objectType":"Photograph","titles":[{"title":"Portrait of a woman","type":"generic title"}],"summaryDescription":"Also known as an ambrotype, the collodion positive was invented by F. Scott Archer in 1822, and was in widespread use by the mid-1850s. To produce a collodion positive, a sheet of glass is hand-coated with a thin film of collodion (guncotton dissolved in ether) containing potassium iodide, and sensitised to the light with silver nitrate to create a collodion negative. The back is then painted black or covered with a piece of dark cardboard or cloth in order to achieve the effect of a positive image.\r\n\r\nThis collodion positive portrait (ca. 1850) depicts a woman with gilt-detailed jewellery and is cased and gilt-framed.","physicalDescription":"Cased (lid missing) and gilt-framed photograph; three-quarter length portrait of a woman facing the viewer with gilt detail to her jewellery. Side-hinged case.","artistMakerPerson":[{"name":{"text":"Unknown","id":"A1848"},"association":{"text":"","id":""},"note":""}],"artistMakerOrganisations":[],"artistMakerPeople":[],"materials":[{"text":"card","id":"x30344"}],"techniques":[{"text":"collodion","id":"AAT162376"}],"materialsAndTechniques":"Collodion positive","categories":[{"text":"Photographs","id":"THES48910"},{"text":"Portraits","id":"THES48906"}],"styles":[],"collectionCode":{"text":"PDP","id":"THES48595"},"images":[],"imageResolution":"high","galleryLocations":[{"current":{"text":"LVLC","id":"THES49171"},"free":"","case":"DAG","shelf":"2","box":""}],"partTypes":[[{"text":"photograph","id":"AAT46300"}],[{"text":"ambrotype","id":"AAT137324"}]],"contentWarnings":[{"apprise":"","note":""}],"placesOfOrigin":[{"place":{"text":"Britain","id":"x32019"},"association":{"text":"made","id":"x28654"},"note":""}],"productionDates":[{"date":{"text":"1850s","earliest":"1850-01-01","latest":"1859-12-31"},"association":{"text":"made","id":"x28654"},"note":""}],"associatedObjects":[],"creditLine":"","dimensions":[{"dimension":"Height","value":"7.2","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"case","note":""},{"dimension":"Width","value":"6","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"case","note":""},{"dimension":"Height","value":"6.3","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"frame","note":""},{"dimension":"Width","value":"5","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"frame","note":""},{"dimension":"Height","value":"5.5","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"image","note":""},{"dimension":"Width","value":"4.2","unit":"cm","qualifier":"","date":{"text":"","earliest":null,"latest":null},"part":"each image","note":""}],"dimensionsNote":"","marksAndInscriptions":[],"objectHistory":"","historicalContext":"","briefDescription":"Anonymous collodion positive photograph with gilt details, in case (lid missing), depicting a portrait of a woman, seated, ca. 1850s.","bibliographicReferences":[],"production":"","productionType":{"text":"Unique","id":"THES48864"},"contentDescription":"","contentPlaces":[],"associatedPlaces":[],"contentPerson":[],"associatedPerson":[],"contentOrganisations":[],"associatedOrganisations":[],"contentPeople":[],"associatedPeople":[],"contentEvents":[],"associatedEvents":[],"contentOthers":[{"text":"portraits","id":"AAT15637"}],"contentConcepts":[],"contentLiteraryRefs":[],"galleryLabels":[],"partNumbers":["161-1944"],"accessionNumberNum":"161","accessionNumberPrefix":"","accessionYear":1944,"otherNumbers":[],"copyNumber":"","aspects":["WHOLE"],"assets":[],"recordModificationDate":"2025-05-03","recordCreationDate":"2004-05-27","availableToBook":false}}