Email digest for the Global Conservation Forum (ConsDistList) egroup. ------------------------------------------------------------------------------------------------------------
1. RE: Hanwell RH and T sensors and VOCs 2. RE: Hanwell RH and T sensors and VOCs 3. Anti-counterfeiting photoluminescent nanomaterials 4. Job Posting: Postdoctoral Researcher (Materials Science – Polymers) 5. Three vacancies at Cambridge University Library 6. RE: Hanwell RH and T sensors and VOCs 7. RE: Hanwell RH and T sensors and VOCs 8. RE: Hanwell RH and T sensors and VOCs 9. RE: Hanwell RH and T sensors and VOCs ------------------------------------------------------------------------------------------------------------ 1.From: Christian Mueller-Straten Posted: Friday January 24, 2025 7:32 AM Subject: RE: Hanwell RH and T sensors and VOCs Message: Hi Sarah, this case is quite spooky. But here are several several things you could check: 1) what exactly measure the sensors: relative humidity or relative dryness? 2) Is there a water source outside the showcase (visitors with raincoats, wet walls or else? 3) What happens exactly to the measured results if you take away the silicagel and place it again in the showcase? 4) Maybe the malfunction is not caused by the sensors, but by the rest of the system (hardware, IT programs). 5) Maybe the rH sensors have aged and were not checked and replaced recently. rH sensors have to be controlled and calibrated annually. The risk of drift changes is depending on the sensor type, the measuring principle used and the level of physical protection. Nevertheless, suitable high-quality sensors are usually stable for many years. The risk of drift with humidity sensors depends on the type of use and the sensor technology. However, humidity sensors have a higher risk of drift than temperature sensors, especially when used in very humid or very dry environments. Hope that helps. Christian ------------------------------ [Christian] [Mueller-Straten] [Researcher, Publisher, Art Historian] [Owner] [Verlag Dr. Christian Mueller-Straten] [Munich] [Germany] [0049-89-839 690 43] [https://www.museum-aktuell.de] https://www.museum-aktuell.de/CEO ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ 2.From: Kim Hewitt Posted: Friday January 24, 2025 11:51 AM Subject: RE: Hanwell RH and T sensors and VOCs Message: The sensor has picked up a sensitivity within the case. Possibly the light source for this case and how is it run and positioned. ------------------------------ Kim Hewitt Brooklyn United States ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ 3.From: Aida Vežić Posted: Friday January 24, 2025 11:52 AM Subject: Anti-counterfeiting photoluminescent nanomaterials Message: Dear colleagues, Please share information about this free webinar interesting for the conservators. Kind regards, Aida Webinar 29th January 2025, 15:30 – 17:00 (CET) The Balkan Museums Network exists to celebrate, preserve and share the complex common heritage of the Balkans. It is based on mutual respect and guided by a commitment to professionalism and shared ethics. Anti-counterfeiting photoluminescent nanomaterialsing cultural heritage through virtual time travel <https://bmuseums.us8.list-manage.com/track/click?u=11eabb42b9d25625736d52ae5&id=831785ac4f&e=89bce6b5c1> 29th January 2025, 15:30 – 17:00 (CET) 1st AURORA Webinar on Anti-counterfeiting photoluminescent nanomaterials to fight the illicit trafficking of artworks AURORA mission is to create a cultural heritage preservation and protection tool employing a robust cost-effective solution to track artworks position and transactions, and fast assess their authenticity, through an easy-to-use methodology for stakeholders operating in the field of artifacts management and protection as art dealers, curators, museum managers, auction houses, policy makers, logistics services, and law enforcement agents. AURORA will realize its ambitious non-destructive solution by combining a multidisciplinary set of excellences in materials science, miniaturized components, and digital technology, to create a nanotechnological chemical marker, and an embedded wireless tracking device converging in a blockchain and IoT based digital tool (AURORA digital tool) through which to implement countermeasures against artwork illicit activities by means of portable devices as smartphones. The first out of three webinars will be focused on the recent achievements in the formulation of invisible inks to be used for tagging artworks surfaces and make them easily recognizable by observing photoluminescence properties of nanomaterials, which emit under UV lamps. Register for the Webinar <https://bmuseums.us8.list-manage.com/track/click?u=11eabb42b9d25625736d52ae5&id=f799564c8e&e=89bce6b5c1> You can download <https://bmuseums.us8.list-manage.com/track/click?u=11eabb42b9d25625736d52ae5&id=2b9f5d41d8&e=89bce6b5c1> the flyer for the webinar. The activities are the part of AURORA (Artwork Unique RecognitiOn and tRacking through chemicAl encoded data, miniaturized devices and blockchain alliance) project that is being funded by the European Union Horizon Europe program. "Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Executive Agency (REA). Neither the European Union nor the granting authority can be held responsible for them." 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This is a fantastic opportunity to contribute to cutting-edge research at the intersection of materials science and cultural heritage, exploring innovative ways to preserve and curate plastic-based materials. Key Details: Deadline to Apply: 6th February For more details and to apply, please visit: https://employment.aub.ac.uk/Vacancy.aspx?ref=AD1514 <https://employment.aub.ac.uk/Vacancy.aspx?ref=AD1514> ------------------------------ Dr Erato Kartaki (she/her) Research Fellow Heritage Science Centre for Plastics Innovation and Curation (PlastIC) Arts University Bournemouth, UK ------------------------------ 5.From: Kristine Rose-Beers Posted: Friday January 24, 2025 3:23 PM Subject: Three vacancies at Cambridge University Library Message: I am happy to share details of three vacancies in the Conservation Department at Cambridge University Library: Conservation Manager (Book & Paper) <https://www.jobs.cam.ac.uk/job/49832/> Salary: 34,866-45,163 Senior Conservator (Book & Paper) <https://www.jobs.cam.ac.uk/job/49862/> Salary: 33,232-39,105 Conservator (Book & Paper) (Part Time, Fixed Term) <https://www.jobs.cam.ac.uk/job/49836/> Salary: 30,505-34,866 pro rata Our dedicated team specialises in the conservation of rare book, manuscript, and library materials and undertakes all aspects of preventive and remedial conservation. This includes disaster planning, environmental monitoring, and rehousing (preventive conservation), as well as the structural repair of historic bookbindings, paper, parchment, archives, and consolidation of media (remedial conservation). We work closely with colleagues to facilitate exhibitions, loans, and digitisation and engage with conservators from different specialisms to look after materials such as textiles, metals, and ceramics. Applications should be submitted online via the University of Cambridge jobs page www.jobs.cam.ac.uk <http://www.jobs.cam.ac.uk/> by clicking "Apply online" in the job advert. You will need an email address to register for our online system. Conversations about flexible working are encouraged at the University of Cambridge. Please feel free to discuss flexibility prior to applying (using the contact information below) or at interview if your application is successful. Informal enquiries are welcomed and should be directed to: Kristine Rose-Beers, Head of Conservation and Heritage Email: [email protected] <[email protected]> If you have any queries regarding the application process please contact: Jacqueline Quintana, Recruitment Administrator on [email protected] <[email protected]> Kristine Rose-Beers ACR Head of Conservation & Heritage Cambridge University Libraries West Road Cambridge CB3 9DR United Kingdom Conservation Advisor Skilliter Centre, Newnham College Tel: +44 (0)1223 760023 Email: [email protected] <[email protected]> Exhibitions <https://exhibitions.lib.cam.ac.uk/> | Events <http://www.lib.cam.ac.uk/using-library/whats> www.lib.cam.ac.uk <http://www.lib.cam.ac.uk/> Facebook <https://www.facebook.com/cambridgeuniversitylibrary/> | Twitter <https://twitter.com/theUL> | Instagram <https://www.instagram.com/cambridgeuniversitylibrary/> This email (together with any files transmitted with it) is intended only for the use of the individual(s) to whom it is addressed. It may contain information which is confidential and/or legally privileged. You may not forward it without the sender's permission. If you have received this email in error, please notify the sender by return email (or telephone) and delete the original message. The sender has taken reasonable precautions to check for viruses but the recipient opens this message at his or her own risk. All correspondence and documentation passing between our respective organisations shall remain subject to contract until such time as a formal agreement is signed and exchanged. For more information about how we handle your personal information, please see http://www.lib.cam.ac.uk/privacy-policy <http://www.lib.cam.ac.uk/privacy-policy>. 6.From: Helena Jaeschke Posted: Friday January 24, 2025 3:23 PM Subject: RE: Hanwell RH and T sensors and VOCs Message: Dear Sarah Have you tried a different brand of datalogger in the case? I would try something like the Lascar EL-USB-2-LCD https://bit.ly/4jsXtv4 It costs £75 but you can read the display while it's in the case and the software is free if you want to download it. They also have BlueTooth and WIFI versions if preferred. Lascar is in Salisbury, so pretty close to you and they're keen to support museums. Hope it helps Helena ------------------------------ Helena Jaeschke, ACR FIIC Conservation Development Officer Museum Development South SWest Taunton UK ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ 7.From: Chris Stavroudis Posted: Friday January 24, 2025 3:24 PM Subject: RE: Hanwell RH and T sensors and VOCs Message: Hi Sarah, Holding an ice cube to the glass would allow you to get an idea of the dew point inside the case. chris ------------------------------ Chris Stavroudis Paintings Conservator Freelance/Private Practice/Self-employed/Independent West Hollywood, California United States ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ 8.From: Sarah Coggins Posted: Friday January 24, 2025 3:24 PM Subject: RE: Hanwell RH and T sensors and VOCs Message: Hello Kim Thanks for your reply. Could you explain your answer a bit more. The lighting in the case is LEDs. How do sensors pick up sensitivity, what is the physical on the sensors? Best regards Sent from Outlook for Android <https://aka.ms/AAb9ysg> Sarah Coggins Conservation Engineer 07470 044624 <tel:07470%20044624> maryrose.org <https://maryrose.org/> Follow us: <https://www.facebook.com/maryrosemuseum> <https://www.instagram.com/maryrosemuseum> <https://www.twitter.com/maryrosemuseum> <https://www.youtube.com/user/MaryRoseMuseum> Please note that I do not work Mondays <https://maryrose.org/dive-4D/> Registered Company No: 1415654 England | VAT Registration No: GB 209 8765 70 | Registered Charity No: 277503 ------------------------------------------- Original Message: Sent: 1/24/2025 8:21:00 AM From: Kim Hewitt Subject: RE: Hanwell RH and T sensors and VOCs The sensor has picked up a sensitivity within the case. Possibly the light source for this case and how is it run and positioned. ------------------------------ Kim Hewitt Brooklyn United States ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ 9.From: Christian Mueller-Straten Posted: Friday January 24, 2025 10:59 PM Subject: RE: Hanwell RH and T sensors and VOCs Message: Hi Sarah, I forgot to ask you two questions: a) what is the reaction of your Hanwell providers? They were probably No 1 to ask. b) When was the data logger last calibrated and by whom? Is there a certificate for the last calibration? Best Christian ------------------------------ [Christian] [Mueller-Straten] [Researcher, Publisher, Art Historian] [Owner] [Verlag Dr. Christian Mueller-Straten] [Munich] [Germany] [0049-89-839 690 43] [https://www.museum-aktuell.de] https://www.museum-aktuell.de/CEO ------------------------------ ------------------------------------------- Original Message: Sent: 01-23-2025 11:40 From: Sarah Coggins Subject: Hanwell RH and T sensors and VOCs Hello conservation community We have two Hanwell RH and T sensors inside a showcase that are reading an RH of >75%. The temperature readings are in an acceptable range of 19-21 degrees centigrade. We cannot determine the cause of the high RH, the small HVAC systems in the case are turned off and isolated and there is no source of water anywhere near the case. The RH in the gallery is low, at around 30-40% although the case is well sealed at 0.23 air exchanges/ day. I have also put a good quantity of silicag gel in the case that has not brought the RH down as would be expected. Equally in the past when cases have had high RH there has been condensation on the interior of the cases and this is not visible on the case in question. The objects inside the case are regularly monitored and we have seen no changes or degradation that would be expected if the RH was in fact >75%. I have replaced the sensors in the case with ones from a very stable area that maintains 55% RH and the sensor quickly read the same high RH but when I put it back in the area with a constant RH of 55% the RH reading has not come down in line with the other sensor in the area. Does anyone have any experience of this happening in their collection? I think I heard once that VOCs can have an effect on the accuracy of RH sensors but I can't remember where I heard that. There may be painted MDF in part of the display mounts or on the objects may be off gassing. I would love to hear your ideas or advice. Thank you ------------------------------ Sarah Coggins Conservation Engineer Mary Rose Trust Southsea United Kingdom ------------------------------ You are subscribed to "Global Conservation Forum (ConsDistList)" as [email protected]. To change your subscriptions, go to http://community.culturalheritage.org/preferences?section=Subscriptions. To unsubscribe from this community discussion, go to http://community.culturalheritage.org/HigherLogic/eGroups/Unsubscribe.aspx?UserKey=d16eaa87-0f69-494b-9f2f-303dbc1222e1&sKey=fab9aa4f27a04c5d876e&GroupKey=757a8f16-505f-4323-8e74-e376757aa9f7.
