{"id":6511,"date":"2018-05-17T10:21:53","date_gmt":"2018-05-17T08:21:53","guid":{"rendered":"http:\/\/test.kreidezeit.de\/?page_id=6511"},"modified":"2018-09-24T13:22:17","modified_gmt":"2018-09-24T11:22:17","slug":"pigment-determination-with-a-micro-burner","status":"publish","type":"page","link":"https:\/\/www.kreidezeit.de\/en\/guidance\/pigment-determination-with-a-micro-burner\/","title":{"rendered":"Pigment determination with a micro burner"},"content":{"rendered":"<hr \/>\n<p>With a simple test it is possible to distinguish mineral from organic pigments. Required are: a spoon, a micro-burner (storm lighter) and the pigment to be tested.<\/p>\n<p><strong>Detection of mineral pigments<\/strong><br \/>\nPut some pigment on a spoon and heat with the burner for a few seconds until the pigment glows. If no plume of smoke rises after the flame has gone out and no smell can be perceived, it is a mineral pigment. However, it is not possible to distinguish between earth and artificial mineral pigments, or toxic and non-toxic pigments. If the color tone of the pigment changes towards red or brown after firing, the pigment contains iron. Some mineral pigments are temperature stable and show no colour change when heated: e.g. spinels, chrome oxide green. Ultramarine violet turns blue when heated. Ultramarine blue separates yellow sulphur under the influence of the blue flame. Titanium white appears yellow when hot and turns white again when it cools down.<br \/>\nNickel titanium yellow turns orange when heated and yellow again when cooled. Toxic lead white already turns into the light yellow toxic lead at temperatures above 230\u00b0C<br \/>\n<strong><br \/>\nRecognition of organic pigments<\/strong><br \/>\nWhen the flame comes into contact with the pigment, whitish ash or a tar-like brew is produced immediately. When the flame goes out, smoke rises. A strong to biting smell (burnt plastic) is perceptible.<\/p>\n<div class=\"su-row\">\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-6-300x200.jpg\" alt=\"kreidezeit naturfarbenPigment determination 1\" width=\"300\" height=\"200\" \/>Burning of yellow ochre <\/div><\/div>\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-7-300x200.jpg\" alt=\"kreidezeit-naturfarben-pigment-determination-2\" width=\"300\" height=\"200\" \/>yellow ochre, red after burning (red ochre!)<\/div><\/div>\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-1-300x200.jpg\" alt=\"kreidezeit-naturfarben-Pigment determination-3\" width=\"300\" height=\"200\" \/>Umber green, Cyprus, reddish brown after burning (burnt Umber)<\/div><\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<div class=\"su-row\">\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-2-300x200.jpg\" alt=\"kreidezeit-naturfarben-pigment-determination-4\" width=\"300\" height=\"200\" \/>burning of artificial polymer based red pigment <\/div><\/div>\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-3-300x200.jpg\" alt=\"kreidezeit-naturfarben-pigment-determination-5\" width=\"300\" height=\"200\" \/>polymer based red pigment with white-grey ashes<\/div><\/div>\n<div class=\"su-column su-column-size-1-3\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"\/wp-content\/uploads\/2018\/05\/Pigmentbestimmung-4-300x200.jpg\" alt=\"kreidezeit-naturfarben-pigment-determination-6\" width=\"300\" height=\"200\" \/>polymer based violet pigment with white ash and rising smoke<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>With a simple test it is possible to distinguish mineral from organic pigments. Required are: a spoon, a micro-burner (storm lighter) and the pigment to be tested. Detection of mineral pigments Put some pigment on a spoon and heat with the burner for a few seconds until the pigment glows. If no plume of smoke [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":3734,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-6511","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pigment determination with a micro burner - KREIDEZEIT Naturfarben GmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kreidezeit.de\/en\/guidance\/pigment-determination-with-a-micro-burner\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pigment determination with a micro burner - KREIDEZEIT Naturfarben GmbH\" \/>\n<meta property=\"og:description\" content=\"With a simple test it is possible to distinguish mineral from organic pigments. 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