Hornblende Posted May 5, 2019 Share Posted May 5, 2019 Hello all,I have been away for a long time due to my studies but I am slowly going back on cool mineral fluorescence photography Below is a picture of leucophanite crystals (a kind of beryllium silicate) fluorescing under UV-long wave. In visible light they are rather boring, colorless to creamy yellow, which contrast with there bright-pink fluorescence! I still have some problem with dust specs and fluorescence of the background material. I need to find a non-fluorescent, very black paint. Canon 6D – El Nikkor 80mm f5.6 – Baader UV/IR cut – Convoy S2 w/ filtered with a baader U Venus filterISO 400 – 8 seconds exposure – f22 Link to comment
Shane Posted May 6, 2019 Share Posted May 6, 2019 I used to use Industrial Krylon 1602 Ultra Flat Black for most of my UV, IR and fluorescence work. It even worked well for covering the internal surface of a light blocking cover that was placed over gem materials being measured on an Ocean Optic integrating sphere. Link to comment
Cadmium Posted May 6, 2019 Share Posted May 6, 2019 Ooo... that is very pretty!Yes, I learned about the 1602 from Shane years ago, works great.It is possible Lee has one of the background materials that will work, I have not tested those yet. Link to comment
Hornblende Posted May 6, 2019 Author Share Posted May 6, 2019 Thanks guys,I will try this paint! Link to comment
Andy Perrin Posted May 6, 2019 Share Posted May 6, 2019 Hornblende, I think Jonathan also mentioned that the Stuart Semple Black 2.0 worked in vis through UV nicely. Link to comment
Harald Posted February 22, 2020 Share Posted February 22, 2020 Hi there,I've just ordered Stuart Semple Black 2.0.Will make a black box for photographing UV minerals. Thanks Andy :D Link to comment
nfoto Posted February 23, 2020 Share Posted February 23, 2020 The Semple really *is* black even under UV. No fluorescence as far as I can ascertain. The problem with backgrounds -- and specimens themselves - usually are caused by deposits of lint. I don't think those problems ever can be completely circumvented. Link to comment
dabateman Posted February 23, 2020 Share Posted February 23, 2020 Yes I also use Semple Black 2. Version 3 wasn't out yet when I bought version 2.Both are really good. Jonathan also tested version 3.It doesn't look black to me under visible light. But it is from a reflection point of view. So with a camera its black. Link to comment
Andy Perrin Posted February 23, 2020 Share Posted February 23, 2020 It doesn't look black to me under visible light. But it is from a reflection point of view. So with a camera its black. You need a microscopically rough surface to get rid of the reflections. People have tried a lot of things, including nanotubes (vantablack) to roughen the surface. I don't think an acrylic paint can replicate that. What we really need is UV polarizers that cost a reasonable amount... Link to comment
Andrea B. Posted February 27, 2020 Share Posted February 27, 2020 Very pretty mineral specimen under UV! Link to comment
Harald Posted October 4, 2020 Share Posted October 4, 2020 Just ordered Stuart Semple Black 3.0 to make a black box150ml for 14.99£ https://culturehustle.com/collections/black Link to comment
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