The very best system for this that I have ever seen is used by Luis Joly in Maracay. He uses a round hole punch on a standard European type acid free card, and then glues a glass coverslip over the hole with a smear of Canada Balsam. He then puts a drop of Balsam on the coverslip on the side that is inside the hole in the card, either enough to glue the genitalia down, or to embed it, depending on the size and shape, and when the CB is cured, mounts it upside down on the pin under the specimen. Then the glass coverslip is up, so that dust does not fall on the open side.
Sounds odd at first, but the specimens are really good.
On 3/2/2015 9:11 AM, Crystal Maier wrote:
I have been reviewing our loan policies, and and it seems that the policy for most collections is that if dissections of genitalia are to be done, the dissection should either be placed in a genitalia vial or on a card below the specimen.
Putting the genitalia vial/pin mount/separate slide mount and the mounting medium debates aside for a minute, if borrowers would like to mount the genitalia on a card on the pin, which is the best substrate (the flat bit to which the slide-mounting medium is attached) to use? I know some people simply glue genitalia to cards with Elmers, etc., but what about making slide mounts to go on the pin? The traditional method seems to be celluloid or cellulose acetate. These seem pretty popular, though I worry about the longevity of this material. I've seen many of these mounts become brittle and yellow, but this is only anecdotal evidence.
Can anyone provide a reference which clearly states that celluloid and cellulose acetate for mounting cards can degrade over time? Also, does anyone know about alternatives and how they well they work/stand up to the test of time? I've used un-frosted mylar or polyester film in the past, which is supposedly archival and can be purchased from library supply companies and art supply stores.
Any thoughts on the matter would be appreciated.
Crystal A. Maier
Insects Collection ManagerField Museum of Natural History
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