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Showing results for tags 'ammonium chloride'.
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From the album: Gunningbland Trilobites
Parkesolithus gradyi (Campbell & Durham, 1970) Late Ordovician Gunningbland Formation Gunningbland, NSW, Australia A latex cast photographed with ammonium chloride coating.-
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From the album: Gunningbland Trilobites
Parkesolithus dictyotos (Webby, 1974) Late Ordovician Gunningbland Formation Gunningbland, NSW, Australia A latex cast photographed with ammonium chloride coating.-
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I am having trouble coating this Isotelus plaster cast. This is my first time attempting the ammonium chloride coating method. First I painted the cast with a thin layer of black acrylic (in retrospect, I probably should have used watercolor?). Then made a number of tries to coat the cast with ammonium chloride and was unsuccessful. I tried placing the cast above the smoke, below and directly in front of the flask, nothing worked. I'm wondering if humidity could be an issue? Has anybody tried applying ammonium chloride as a fine liquid spray or magnesium ribbon? Any tips appreciated.
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Whitening of fossils with ammonium chloride is a common and effective method to enhance the contrast for pictures. Here you can download a short "how to do video" : https://www.researchgate.net/publication/287444709_Whitening_fossils_with_ammonium_chloride Ammonium chloride is water soluble - the process is reversible (if the fossil tolerates rinsing with water). Have fun Thomas
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