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A pragmatic approach to preventive conservation Lighting design support for Madeleine Vionnet, puriste de la mode Exhibition at musée des arts décoratifs in Paris from August 2009 to February 2010 . ICOM-CC Triennial 16th Conference – 19/23 september 2011, Lisbon.

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A pragmatic approach to preventive conservation Lighting design support for

Madeleine Vionnet, puriste de la mode

Exhibition at musée des arts décoratifs

in Paris from August 2009 to February 2010.

ICOM-CC Triennial 16th Conference – 19/23 september 2011, Lisbon


Specificity of exhibition lighting

The art of lighting  is an integral part of an exhibition.

Exhibition lighting contains two objective aspects:

- impact of lighting on object conservation : three factors cause damage on objects, spectral sensitivity of the object, spectral composition of the light source and the total luminous exposure.

- impact of lighting on visitor’s vision : lighting must give visitors a good view of presented objects, without glare, unwanted reflects or sufficient illumination.

and one subjective aspect:

- lighting for display is not only a challenge for visibility and conservation. As part of the spatial design, it must participate with the interpretation and be meaningful. In fact, exhibition lighting is a visual semiotic system.

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Madeleine Vionnet Exhibition

  • Seven months exposure instead of the usual three months for a temporary exhibition.

  • The objects presented in highly sensitive materials (textiles)

  • A famous design firm to set the exhibition (Andrée Putman)

  • A large budget (patronage)

  • A place very structured (showcases)

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The scenography

  • walls or ceilings, bright white

  • Walls or ceilings, matt black

  • Walls, ceilings or floors, glossy black

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The action of preventive conservation in lighting

To assist for the selection of light sources,

To decide of the total luminous exposure,

To propose different ways to achieve the goals of limiting the illumination

To be able to measure the light exposure

To measure of fading,

To review the actions

To make new proposals for future exhibitions

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1. To provide assistance for selection of light sources

Imposed by the lighting design project:- Fluorescent tubes T5 28W 830

Imposed by the existing installation:- Halogen MR16 50W

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2. To decide of the maximum of total luminous exposure accepted

Sensitivity and classification for cultural property

The table below lists materials in four categories according to their sensitivity to light

Table 1. Classification of sensitive cultural property from CIE 157:2004

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2. To decide of the maximum of total luminous exposure accepted

Sensitivity and classification for cultural property

The table below lists materials in four categories according to their sensitivity to light

Table 1. Classification of sensitive cultural property from CIE 157:2004

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2. To decide of the maximum of total luminous exposure accepted

Sensitivity and classification for cultural property

The table below lists materials in four categories according to their sensitivity to light

Table 1. Classification of sensitive cultural property from CIE 157:2004

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2. To decide of the maximum of total luminous exposure accepted

The following table gives the recommended values of maximum total luminous exposure for the different classes of light sensitive objects.

Table 2. Total luminous exposure for different classes of light sensitive objectinterpreted from CIE 157:2004

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2. To decide of the maximum of total luminous exposure accepted

The following table gives the recommended values of maximum total luminous exposure for the different classes of light sensitive objects.

Table 2. Total luminous exposure for different classes of light sensitive objectinterpreted from CIE 157:2004

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2. To decide of the maximum of total luminous exposure accepted

15 000 lx.h/y = 300 hours x 50 lux (1 month)

For seven months the dose would be close to 100 Klx h/y (15 000 lx.h x 7 = 105 Klx.h/exhibit)

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3. Propose different ways to achieve the acceptedgoals of limiting the illumination

  • But 50 lux is extremely low illumination, we propose an average of 75 lux with a dynamic lighting between 30 and 150 lux. (150 klx.h)

  • Illumination of all white surfaces (walls and ceelings) by fluorescents dynamic lighting.

  • Increase and decrease light levels very slowly to be imperceptible by visitors

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White wall backlight principle fluorescent lamps.

spotlight

Fluorescent lamps

ceiling

White screen

dress

wall

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White wall backlight principle fluorescent lamps.

spotlight

Fluorescent lamps

ceiling

White screen

dress

wall

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White ceiling backlight principle fluorescent lamps.

Fluorescent lamps

spotlights

ceiling

Translucent white ceiling

dress

wall

Glossy blavk floor

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19 fluorescent lamps.


4. To be able to measure of light exposure fluorescent lamps.

  • Dosimeters placed at various locations

  • Sensor for measuring the exposure time

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Difference in sensitivity of LightCheck according to the illumination source

A E of 25 corresponds to a light exposure of 10 000 lux.h

A E of 25 corresponds to a light exposure of 18 000 lux.h

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Dosimeter Lightcheck illumination source( Lido project)

E CIELAB : 0 14 19 65 71

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Dosimeter Lightcheck illumination source( Lido project)

E CIELAB : 0 14 19 65 71

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Determination of the total luminous exposure illumination sourceby looking at the change of color, with the calibration chart

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Determination of the total luminous exposure illumination sourceon the back of dress #52 18 76 (in showcase # 22 during the time of the exhibit)

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19 000 lx.h

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electronic dosimeter illumination source

The sensor records the light from the start until the lights are off

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5. colorimetric measurement illumination source

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5. colorimetric measurement illumination source

« Before » measures of E CIELAB between the object and reference plate

« After »  measures of E CIELAB between the object and reference plateDetermine the difference of color differences before and after exposure

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Determine the difference of color differences before and after exposure

Table of results before and after exposure.

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Recommendations after exposure

  • Dynamic lighting, variable in time, variable in illumination, must remain a requirement. Need to review or re-installing a new system of lighting management for showcases on this exhition room.

  • The exposure time, when the public is absent, must be reduced. It seems unnecessary to open the room two hours before the public comes, when an hour would be more than enough to ensure the proper functionning of electrical and electronic equipment.

  • Also required the creation of a work lighting for exhibition setting and maintenance other than the light coming from the display cases.

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Thank you after exposure

you for your attention

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