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- Holger_F._Struer abstract "Holger F. Struer was a Danish chemist and founder of \"H. Struers Chemiske Laboratorium\" (In Danish: \"Struers Kemiske Laboratorium\") in 1875 at Skindergade 38, the centre of Copenhagen. Struers introduced in 1943 Micropol, a new principle for electrolytic polishing which made the preparation process within metallography more controlled in order to achieve better preparation results.The development of metallography was a continuous struggle to find better and easier methods to prepare metal surfaces for microstructure observation. Struers based his new principle for electrolytic polishing on Count Alois von Beckh Widmanstätten and his early experiments from the beginning of the 19th century that revealed the structure of iron from a meteor which had come down earlier in the century. He noticed that the structure could better be seen on plane, fine polished surfaces. By pouring nitric acid over the surface and letting it react for some time, he actually made a deep etch which developed the macrostructure. Pieces etched this way were used for printing the structure directly on paper. These \"nature prints\" turned \"metallography\" into lithography. All these experiments did not lead to any evaluation of the microstructure, but were limited to the macrostructure.However, in 1863 Henry Clifton Sorby described in detail how he ground and polished samples in order to examine them under the microscope. He was able to magnify the structure up to 650x. From these observations he drew conclusions regarding the structure of pearlite and ferrite, and he was also able to watch the recrystallization of steel during cold working. For recording the microstructures he used three different methods available at the time: drawings, \"nature printing\" and microphotography. Considering that his research in the area of metallography only lasted two years, he discovered and established a wealth of information, and Sorby is considered to be the founder of metallography.Holger F. Struer saw the need for a laboratory making chemical analysis in the strongly developing \"modern society\", and in 1895 Struer began importing chemicals and instruments for the Danish market. In 1919 Struer obtained the Danish representation of the Austrian company, Reichert, a specialist in metallographic microscopes. The combination of chemical knowledge and the sale of metallographic microscopes changed the focus of Struer's company to metallography and metallographic analysis. In 1943 H. Struers Chemiske Laboratorium launched Micropol, and a new principle for electrolytic polishing was established. The introduction of Micropol was a technological progress since in this way the materialographic preparation process became more controlled in order to achieve an optimal preparation result in the shortest possible time. Today metallography is a part of materials science in its own right and extends to all fields of application, including ceramics, composites, electronic components and other solid materials. H. Struers Chemiske Laboratorium is still active within metallography but is today just called \"Struers A/S\".".
- Holger_F._Struer thumbnail Micropol.jpg?width=300.
- Holger_F._Struer wikiPageExternalLink astm-metallographic-materialographic.htm.
- Holger_F._Struer wikiPageExternalLink 1G1-78056198.html.
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- Holger_F._Struer wikiPageExternalLink 36art2.pdf.
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- Holger_F._Struer wikiPageWikiLink Category:Danish_chemists.
- Holger_F._Struer wikiPageWikiLink Category:Year_of_birth_missing.
- Holger_F._Struer wikiPageWikiLink Category:Year_of_death_missing.
- Holger_F._Struer wikiPageWikiLink Chemist.
- Holger_F._Struer wikiPageWikiLink Copenhagen.
- Holger_F._Struer wikiPageWikiLink Count_Alois_von_Beckh_Widmanstätten.
- Holger_F._Struer wikiPageWikiLink File:Micropol_preparation_machine.jpg.
- Holger_F._Struer wikiPageWikiLink Henry_Clifton_Sorby.
- Holger_F._Struer wikiPageWikiLink Metallography.
- Holger_F._Struer wikiPageWikiLink Skindergade.
- Holger_F._Struer wikiPageWikiLinkText "Holger F. Struer".
- Holger_F._Struer wikiPageWikiLinkText "Struers".
- Holger_F._Struer name "Struer, Holger F.".
- Holger_F._Struer shortDescription "Danish chemist".
- Holger_F._Struer wikiPageUsesTemplate Template:Citation.
- Holger_F._Struer wikiPageUsesTemplate Template:More_footnotes.
- Holger_F._Struer wikiPageUsesTemplate Template:Persondata.
- Holger_F._Struer wikiPageUsesTemplate Template:Reflist.
- Holger_F._Struer description "Danish chemist".
- Holger_F._Struer description "Danish chemist".
- Holger_F._Struer subject Category:Danish_chemists.
- Holger_F._Struer subject Category:Year_of_birth_missing.
- Holger_F._Struer subject Category:Year_of_death_missing.
- Holger_F._Struer hypernym Chemist.
- Holger_F._Struer type Agent.
- Holger_F._Struer type Person.
- Holger_F._Struer type Scientist.
- Holger_F._Struer type Person.
- Holger_F._Struer type Scientist.
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- Holger_F._Struer type Q215627.
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- Holger_F._Struer comment "Holger F. Struer was a Danish chemist and founder of \"H. Struers Chemiske Laboratorium\" (In Danish: \"Struers Kemiske Laboratorium\") in 1875 at Skindergade 38, the centre of Copenhagen.".
- Holger_F._Struer label "Holger F. Struer".
- Holger_F._Struer sameAs Q5880221.
- Holger_F._Struer sameAs m.04gj17c.
- Holger_F._Struer sameAs Q5880221.
- Holger_F._Struer wasDerivedFrom Holger_F._Struer?oldid=708113977.
- Holger_F._Struer depiction Micropol.jpg.
- Holger_F._Struer givenName "Holger F.".
- Holger_F._Struer isPrimaryTopicOf Holger_F._Struer.
- Holger_F._Struer name "Holger F. Struer".
- Holger_F._Struer name "Struer, Holger F.".
- Holger_F._Struer surname "Struer".