An old slide

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TonyT
Posts: 184
Joined: Fri Sep 11, 2020 8:30 pm
Location: New Brunswick, CANADA

An old slide

#1 Post by TonyT » Sat Feb 25, 2023 7:52 pm

Today I started sorting my rather large slide collection and discoved some slides I made 57 years ago. And then I saw Neal Shields
posts of today where he pondered why someone would spend a lot of time incorrectly mounting a specimen that would not survive for at least 50 years.

HERE

This Black Fly (Simulium luggeri, male) is a Canada Balsam mount from 1965. The CB has turned to orange-yellow but this was easy to correct with one click in Photoshop. I rather prefer the original!
Top image: full frame shot with Leitz relay lens on bellows
Bottom: colour-corrected crop.
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simulium 25ii23.jpg
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simulium crop 25ii23.jpg
simulium crop 25ii23.jpg (172.76 KiB) Viewed 1302 times
New Brunswick
Canada

MichaelG.
Posts: 3980
Joined: Mon Apr 10, 2017 8:24 am
Location: North Wales

Re: An old slide

#2 Post by MichaelG. » Sat Feb 25, 2023 8:15 pm

The Canada Balsam may have yellowed, but at least it still looks beautifully homogeneous
… orders of magnitude better than the dreaded NuMount crystallisation !!

MichaelG.

.

https://www.nhm.ac.uk/hosted_sites/acar ... mmary.html
Too many 'projects'

TonyT
Posts: 184
Joined: Fri Sep 11, 2020 8:30 pm
Location: New Brunswick, CANADA

Re: An old slide

#3 Post by TonyT » Sun Feb 26, 2023 4:10 pm

Michael,
Interesting comments. I have used synthetic mounting media in the past and found that after several years the coverslips simple fell off. I now stick with Euparal and Canada Balsam.

Diolch,

Tony
New Brunswick
Canada

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