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There are 11 messages totaling 2691 lines in this issue.
Topics of the day:
1. Risk Assessment, Flash Light Exposure (10)
2. New job opportunity
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Date: Thu, 30 Aug 2018 11:36:44 +0100
From: Kira Zumkley <[log in to unmask]AC.UK>
Subject: Risk Assessment, Flash Light Exposure
Hi all,
I was wondering if any of you have a document outlining the risk to a painting/drawing being exposed to flash light?
Anything along those lines would be helpful.
Many thanks,
Kira
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Date: Thu, 30 Aug 2018 11:02:51 +0000
From: colin white <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
Kira,
This is the work done on flash by the National Gallery. It is over 20 years old but still holds true today.
https://www.nationalgallery.org.uk/upload/rtf/ saunders1995.rtf
All the best, Colin.
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From: AHFAP, for image professionals in the UK cultural heritage sector <[log in to unmask]> on behalf of Kira Zumkley <[log in to unmask]AC.UK>
Sent: 30 August 2018 11:36
To: [log in to unmask]
Subject: Risk Assessment, Flash Light Exposure
Hi all,
I was wondering if any of you have a document outlining the risk to a painting/drawing being exposed to flash light?
Anything along those lines would be helpful.
Many thanks,
Kira
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Date: Thu, 30 Aug 2018 11:03:07 +0000
From: Paul Adair <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
I've always felt this was a failure to understand that intensity x time equals exposure - with the exposure being the important bit. The conclusion being that within reason flash exposure was not a real issue.
Waiting for everyone to say I'm wrong now!
Best wishes
Paul
Perth Museum & Art Gallery
-----Original Message-----
From: AHFAP, for image professionals in the UK cultural heritage sector [mailto:[log in to unmask]] On Behalf Of Kira Zumkley
Sent: 30 August 2018 11:37
To: [log in to unmask]
Subject: Risk Assessment, Flash Light Exposure
Hi all,
I was wondering if any of you have a document outlining the risk to a painting/drawing being exposed to flash light?
Anything along those lines would be helpful.
Many thanks,
Kira
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Date: Thu, 30 Aug 2018 12:41:50 +0000
From: colin white <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
No Paul. You've pretty much summed it up. There is a little more to it but in general allowing flash photography, unless continually by the public, is usually the safest way to record cultural heritage objects.
Colin.
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Date: Thu, 30 Aug 2018 15:05:38 +0100
From: Kira Zumkley <[log in to unmask]AC.UK>
Subject: Re: Risk Assessment, Flash Light Exposure
Thanks Coline
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Date: Thu, 30 Aug 2018 15:07:28 +0100
From: Kira Zumkley <[log in to unmask]AC.UK>
Subject: Re: Risk Assessment, Flash Light Exposure
Hi Paul, Hi Colin,
I appreciate what you are saying, but I would like to give the client as much reassurance as possible, no matter how minimal the actual impact, hence the question.
Thanks,
Kira
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Date: Thu, 30 Aug 2018 14:24:04 +0000
From: colin white <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
Kira,
I think it would be best to refer your client to David Saunders conclusion in the paper from 1995 for reassurance.
All the best, Colin.
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From: AHFAP, for image professionals in the UK cultural heritage sector <[log in to unmask]> on behalf of Kira Zumkley <[log in to unmask]AC.UK>
Sent: 30 August 2018 15:07
To: [log in to unmask]
Subject: Re: Risk Assessment, Flash Light Exposure
Hi Paul, Hi Colin,
I appreciate what you are saying, but I would like to give the client as much reassurance as possible, no matter how minimal the actual impact, hence the question.
Thanks,
Kira
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Date: Thu, 30 Aug 2018 16:23:47 +0100
From: Kira Zumkley <[log in to unmask]AC.UK>
Subject: Re: Risk Assessment, Flash Light Exposure
Thanks Colin, will use that as a template and adjust it for what we are after.
Much appreciated!
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Date: Thu, 30 Aug 2018 08:40:35 -0700
From: Louis Porter <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
[Message contains invalid MIME fields or encoding and could not be processed]
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Date: Thu, 30 Aug 2018 17:06:33 +0100
From: AHFAP Webteam <[log in to unmask]>
Subject: New job opportunity
We have an exciting new job opportunity at Tate Britain advertised on our website.
More info here: http://www.ahfap.org.uk/resource/jobs/
Thanks,
AHFAP Webteam
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Date: Thu, 30 Aug 2018 16:07:11 +0000
From: Andrew Bruce <[log in to unmask]>
Subject: Re: Risk Assessment, Flash Light Exposure
Hi Kira
Nice article by Terry T. Schaeffer for The Getty Conservation Institute that I think should answer your question very well (admittedly it is 212 pages long!)
I've uploaded it to dropbox here: https://www.dropbox.com/s/rwph47g6lccawmg/ effectsoflightonmaterialsincol lections.pdf?dl=0
Whenever I'm describing flash I normally say that my camera is set to f7.1 at 100th of a second and the flash power is set to match that, which means the light from the flashes is about as bright as a pretty sunny summer day, but it's effectively like you're only exposing your object to that sunny summer light for a fraction of a second. Obviously this is a simplification, but I think it can help when explaining to non-photographers. Xenon flashtubes produce a pretty lovely smooth spectral output so are often less damaging than exposing an object to a poorer quality light source that might have a pretty spikey spectral output.
Hope that helps
Best
Andrew
Andrew Bruce
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From: AHFAP, for image professionals in the UK cultural heritage sector <[log in to unmask]> on behalf of Kira Zumkley <[log in to unmask]AC.UK>
Sent: 30 August 2018 11:36:44
To: [log in to unmask]
Subject: Risk Assessment, Flash Light Exposure
Hi all,
I was wondering if any of you have a document outlining the risk to a painting/drawing being exposed to flash light?
Anything along those lines would be helpful.
Many thanks,
Kira
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End of AHFAP Digest - 29 Aug 2018 to 30 Aug 2018 (#2018-105)
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