Hi, long time lurker here. :) I contacted Dr. Jeff Lloyd who is a wood expert and mycologist. His reply is as follows:
- Yep is mold, maybe *Aspergillus* but too out of focus. Is on oak and from end grain which is mildy interesting – perhaps wet inside but surface dry for a period of couple weeks. Check the wood moisture content and museum RH and assuming it is *less than* 19 % and 70 % respectively and will remain so it will not grow back and you can just clean it off. I hope this helps! Janet JAK Consulting Services www.JAKConsultingServices.com ja...@jakconsultingservices.com On Tuesday, March 19, 2024 at 11:35:15 AM UTC-4 sd2057 wrote: > It might be the decaying residue of a removed sticky label? > > Is this the only surface area with this deposit or are there other surface > areas with this sort of deposit? > > > > Stephanie De Roemer FIIC > > UCM Conservator of Objects Fitzwilliam Museum > > > > ICOM-CC Directory Board Vice Chair > > > > > > *From: *pest...@googlegroups.com <pest...@googlegroups.com> on behalf of > Dan Wixted <dj...@cornell.edu> > *Date: *Tuesday, 19 March 2024 at 13:14 > *To: *pest...@googlegroups.com <pest...@googlegroups.com> > *Subject: *RE: [PestList] Is this mold? > > I checked with some contacts I have in the wood preservation industry. > It’s definitely not mold, but also is unlikely to be a wood preservative. > Perhaps it’s from a stain, urethane, or lacquer or something like that. > > > > Dan Wixted > > *Extension Support Specialist* > > > > *Cornell Cooperative Extension* > > *Pesticide Safety Education Program* > > 135 CALS Surge Facility > > 525 Tower Road > > Ithaca, NY 14853 > > psep.cce.cornell.edu > > dj...@cornell.edu > > 607-255-7525 <(607)%20255-7525> > > > > *Cornell Cooperative Extension is an equal opportunity, affirmative action > educator and employer* > > > > *From:* pest...@googlegroups.com <pest...@googlegroups.com> *On Behalf Of > *Dan Wixted > *Sent:* Tuesday, March 19, 2024 8:47 AM > *To:* pest...@googlegroups.com > *Subject:* RE: [PestList] Is this mold? > > > > It definitely looks crystalline. It also has a bit of greenish tinge. I > wonder if the wood was ever treated with a copper-based preservative. > > > > Dan Wixted > > *Extension Support Specialist* > > > > *Cornell Cooperative Extension* > > *Pesticide Safety Education Program* > > 135 CALS Surge Facility > > 525 Tower Road > > Ithaca, NY 14853 > > psep.cce.cornell.edu > > dj...@cornell.edu > > 607-255-7525 <(607)%20255-7525> > > > > *Cornell Cooperative Extension is an equal opportunity, affirmative action > educator and employer* > > > > *From:* pest...@googlegroups.com <pest...@googlegroups.com> *On Behalf Of > *Parichat S > *Sent:* Tuesday, March 19, 2024 5:13 AM > *To:* pest...@googlegroups.com > *Subject:* Re: [PestList] Is this mold? > > > > It looks like a salt crystal to me, not mold. It might be a flake of old > lacquer residue. > > > > Regards, > > > > > > On Tue, 19 Mar 2024 at 16:00, Hingst, Volker <volker...@lvr.de> wrote: > > NO mold – pretty sure > > > > best regards > > > > V o l k e r H i n g s t > > > > Diplom-Restaurator Volker Hingst > IPM-Koordinator > --------------------------------------- > *LVR - Archivberatungs- und Fortbildungszentrum* > > Technisches Zentrum / Papierrestaurierung > > > Ehrenfriedstr.19 > 50259 Pulheim > Tel.: 02234-9854-236 > Fax: 0221-8284-2479 > E-Mail: volker...@lvr.de > Internet: www.afz.lvr.de > > > > > > *Von:* 'Adam Novello' via MuseumPests <pest...@googlegroups.com> > *Gesendet:* Dienstag, 19. März 2024 01:58 > *An:* pest...@googlegroups.com > *Betreff:* Re: [PestList] Is this mold? > > > > ****Hinweis:* Diese E-Mail von pestlist+bncbcm4xihq6...@googlegroups.com > stammt von einer *externen* Quelle. Öffnen Sie nur Inhalte, denen Sie > vertrauen.*** > > > > Hi Chelsee, > > > > It doesn't look like mold to me. Normally mold has a bushy appearance when > examined up close due to the hyphae. You can try gently brushing the > surface with a cotton swab to see if it rolls onto itself or, if inactive, > it will brush off the wood into a powder. You can also try using a UV light > to see if it illuminates. Some molds will have a white illumination. > > > > Hope this helps! It's hard to tell of the close up but the substance looks > like it may be a fatty material like wax. > > > > > > > > > > On Mon, Mar 18, 2024 at 7:31 PM Chelsee Boehm <cbo...@cityofukiah.com> > wrote: > > Hi all, > > > > I know this might not be exactly the right venue, but I wanted to reach > out and see what you all think. We had a wood object come into the museum, > and it has some places on the back where I think it might have been moldy. > I know that wood can also ‘bloom,’ but I am not sure which it might be… > > I know it is hard to tell in photos, but I appreciate any insight that > anyone can offer. > > > > Thank you so much! > > > > *Chelsee Boehm *(*she/her*) > > Curator of Collections & Exhibits > > Grace Hudson Museum > > > > (707) 467-2836 museum > > (707) 467-5754 direct line > > cbo...@cityofukiah.com > > > > > > > > *Disclaimer* > > The information contained in this communication from the sender is > confidential. It is intended solely for use by the recipient and others > authorized to receive it. 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