Abstract: Examines the removal of dirt from some of Turner's unvarnished oil paintings: the ... more Abstract: Examines the removal of dirt from some of Turner's unvarnished oil paintings: the nature of the dirt on his unfinished paintings-greasy particles, smoke, sulphur dioxide; the adhesion of dirt-birding, absorption, etc.; cleaning-application on cotton wool swabs of ...
Speckle interferometry techniques with their high resolution full-field measurement capability of... more Speckle interferometry techniques with their high resolution full-field measurement capability offer a means of investigating the complex stress-strain behaviour of art objects under relatively low loading conditions. The focus of this paper is the investigation of art samples using the optical techniques of shearography and digital holography. A typical icon construction is a number of layers of egg tempera paint, gold paint and grounding on a wooden base. Oil paintings on canvas are typically composed of a number of layers of priming and oil paint on a canvas, with the canvas tension controlled by the stretcher. In both cases there is an opportunity for a complex stress field to develop as the canvas or wood expands or contracts at different rates to the paint and priming layers under changes in humidity and temperature. Shearography is a full-field optical technique, employing a common path shearing interferometer, which is sensitive to the displacement gradient. Digital holograp...
Shearography is a full-field optical technique usually used for non-destructive testing and for t... more Shearography is a full-field optical technique usually used for non-destructive testing and for the measurement of surface strains. This work is the development of a novel Impact Assessment Procedure (IAP), using shearography to collect the data about the condition of the artwork. This is a multi-step process with the first step being the recording of reference phase maps and the determination of signature features (anomalies in the phase map profile). After the artwork has undergone an impact which could possibly change its condition (e.g. transportation, malicious damage, conservation, aging) it is re-measured and the data is compared with the reference. The information obtained can be used by conservators to guide future conservation strategies on the artwork. This manuscript describes the development of a custom shearography prototype sensor for this purpose and the development of the IAP with a measurement programme on canvas and wooden panel painting samples.
Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More, 2007
... 1Cédric Thizy, 1Marc P. Georges, 2Eleni Kouloumpi, 3Tim Green, 3Stephen Hackney,4Vivi Tornari... more ... 1Cédric Thizy, 1Marc P. Georges, 2Eleni Kouloumpi, 3Tim Green, 3Stephen Hackney,4Vivi Tornari 1 Centre Spatial de Liège Université de Liège, Liège Science Park, B-4031 Angleur, Belgium ... Two types of artwork are considered : wooden icons and textile canvas paintings. ...
O3A: Optics for Arts, Architecture, and Archaeology, 2007
This is one of a series of papers submitted by the Multi-Encode Project consortium (006427 (SSPI)... more This is one of a series of papers submitted by the Multi-Encode Project consortium (006427 (SSPI)). Shearography, a full-field speckle interferometry technique, is applied to the investigation of movable cultural heritage. For this project a portable shearography sensor was ...
The tensile properties of latex coatings were investigated with a set of custom formulated artist... more The tensile properties of latex coatings were investigated with a set of custom formulated artist-type paints at an age of 1 year. All films in the study contained a poly(methyl methacrylate-cobutyl acrylate) binder exhibiting a glass-transition at approximately 10°C. The viscoelastic behaviour of the latex matrix is first highlighted through a series of experiments involving different strain histories and temperatures.
Experimental Analysis of Nano and Engineering Materials and Structures, 2007
This is an introductory paper of a recent EC project dealing with research in cultural heritage a... more This is an introductory paper of a recent EC project dealing with research in cultural heritage and aiming to communicate new fields of application for optical metrology techniques. The project is in its initial state and more conclusive information is expected to be available at the time of the perspective conference. Nowadays safety, ethical, economical and security issues as well
The use of preventive conservation measures to assist in retarding the deterioration of painting ... more The use of preventive conservation measures to assist in retarding the deterioration of painting canvases has been suggested by the Conservation Department of the Tate Gallery [S. Hackney and T. Ernst, The applicability of alkaline reserves to painting canvases, in ...
Abstract: Examines the removal of dirt from some of Turner's unvarnished oil paintings: the ... more Abstract: Examines the removal of dirt from some of Turner's unvarnished oil paintings: the nature of the dirt on his unfinished paintings-greasy particles, smoke, sulphur dioxide; the adhesion of dirt-birding, absorption, etc.; cleaning-application on cotton wool swabs of ...
Speckle interferometry techniques with their high resolution full-field measurement capability of... more Speckle interferometry techniques with their high resolution full-field measurement capability offer a means of investigating the complex stress-strain behaviour of art objects under relatively low loading conditions. The focus of this paper is the investigation of art samples using the optical techniques of shearography and digital holography. A typical icon construction is a number of layers of egg tempera paint, gold paint and grounding on a wooden base. Oil paintings on canvas are typically composed of a number of layers of priming and oil paint on a canvas, with the canvas tension controlled by the stretcher. In both cases there is an opportunity for a complex stress field to develop as the canvas or wood expands or contracts at different rates to the paint and priming layers under changes in humidity and temperature. Shearography is a full-field optical technique, employing a common path shearing interferometer, which is sensitive to the displacement gradient. Digital holograp...
Shearography is a full-field optical technique usually used for non-destructive testing and for t... more Shearography is a full-field optical technique usually used for non-destructive testing and for the measurement of surface strains. This work is the development of a novel Impact Assessment Procedure (IAP), using shearography to collect the data about the condition of the artwork. This is a multi-step process with the first step being the recording of reference phase maps and the determination of signature features (anomalies in the phase map profile). After the artwork has undergone an impact which could possibly change its condition (e.g. transportation, malicious damage, conservation, aging) it is re-measured and the data is compared with the reference. The information obtained can be used by conservators to guide future conservation strategies on the artwork. This manuscript describes the development of a custom shearography prototype sensor for this purpose and the development of the IAP with a measurement programme on canvas and wooden panel painting samples.
Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More, 2007
... 1Cédric Thizy, 1Marc P. Georges, 2Eleni Kouloumpi, 3Tim Green, 3Stephen Hackney,4Vivi Tornari... more ... 1Cédric Thizy, 1Marc P. Georges, 2Eleni Kouloumpi, 3Tim Green, 3Stephen Hackney,4Vivi Tornari 1 Centre Spatial de Liège Université de Liège, Liège Science Park, B-4031 Angleur, Belgium ... Two types of artwork are considered : wooden icons and textile canvas paintings. ...
O3A: Optics for Arts, Architecture, and Archaeology, 2007
This is one of a series of papers submitted by the Multi-Encode Project consortium (006427 (SSPI)... more This is one of a series of papers submitted by the Multi-Encode Project consortium (006427 (SSPI)). Shearography, a full-field speckle interferometry technique, is applied to the investigation of movable cultural heritage. For this project a portable shearography sensor was ...
The tensile properties of latex coatings were investigated with a set of custom formulated artist... more The tensile properties of latex coatings were investigated with a set of custom formulated artist-type paints at an age of 1 year. All films in the study contained a poly(methyl methacrylate-cobutyl acrylate) binder exhibiting a glass-transition at approximately 10°C. The viscoelastic behaviour of the latex matrix is first highlighted through a series of experiments involving different strain histories and temperatures.
Experimental Analysis of Nano and Engineering Materials and Structures, 2007
This is an introductory paper of a recent EC project dealing with research in cultural heritage a... more This is an introductory paper of a recent EC project dealing with research in cultural heritage and aiming to communicate new fields of application for optical metrology techniques. The project is in its initial state and more conclusive information is expected to be available at the time of the perspective conference. Nowadays safety, ethical, economical and security issues as well
The use of preventive conservation measures to assist in retarding the deterioration of painting ... more The use of preventive conservation measures to assist in retarding the deterioration of painting canvases has been suggested by the Conservation Department of the Tate Gallery [S. Hackney and T. Ernst, The applicability of alkaline reserves to painting canvases, in ...
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Papers by Stephen Hackney