{"id":4411,"date":"2016-05-06T08:00:51","date_gmt":"2016-05-06T14:00:51","guid":{"rendered":"https:\/\/www.ulprospector.com\/knowledge\/?p=4411"},"modified":"2018-08-14T16:19:51","modified_gmt":"2018-08-14T22:19:51","slug":"pc-using-effect-pigments-limitless-coatings-design-possibilities","status":"publish","type":"post","link":"https:\/\/ulprospector.ul.com\/4411\/pc-using-effect-pigments-limitless-coatings-design-possibilities\/","title":{"rendered":"Using Effect Pigments for Limitless Coatings Design Possibilities"},"content":{"rendered":"

\"effectpigments02\"Effect pigments <\/a>provide an infinite array of colors and effects that enable unlimited design possibilities for coatings.\u00a0These effects include the illusion of flickering lights, metallic reflection, interference sparkle and color variation and luster that changes with the viewing angle and light source.<\/p>\n

They are used in a variety of coatings, including those in automotive, monumental and smaller buildings as well as other industrial and product finishing applications. Pigments may be broadly classified by their ability to reflect light: absorption, metallic and interference.<\/p>\n

Conventional organic and inorganic pigments are classified as absorption pigments, <\/em><\/strong>because they absorb certain wavelengths of the incident light that strikes their surface. The sensation of color is produced by the remaining component of the reflected visible light that produces the color we observe.<\/p>\n

For example, a quinacridone red pigment <\/a>reflects the portion of the light that produces a red color and absorbs the rest of the light energy. Titanium dioxide<\/a> reflects all of the light and absorbs none, while carbon black<\/a> absorbs all and reflects none. Due to their ability to absorb light, absorption pigments do not display a metallic luster or iridescence and are thus one dimensional<\/em><\/strong> in their ability to interact with light.<\/p>\n

Metallic pigments<\/a> consist of tiny flat pieces of aluminum, bronze, zinc, copper, silver or other metals that reflect light and thus create a metallic luster. These pigments are two- dimensional <\/em><\/strong>or metallic pigments<\/em><\/strong>.<\/p>\n

\n

Looking for effect pigments for your coatings formulation?<\/h3>\n

Prospector has listings for effect pigments from global suppliers. View technical data, request samples and\u00a0more now.<\/p>\n


\nGet Material Data
\n<\/a><\/h3>\n
\n

Interference pigments consist of various layers of, for example, a metal oxide<\/a> deposited onto mica<\/a>, a natural mineral. Light striking the surface of these pigments is refracted, reflected and scattered by the layers that make up the pigment. Through a superimposition (or interference) of the reflected rays of light, a changing array of color is created, with the most intense color seen at the angle of reflection.<\/p>\n

Effect pigments are unique in respect to how they interact with light due to their geometry which is normally a platelet with a high aspect ratio (ratio of width to height). Depending upon the specific technology, a wide variety of colors and effects can be created, such as interference shimmers, color travel effects or metallic reflection.<\/p>\n

Metallic Flake Pigments<\/em><\/strong> are platelet in structure with a chemical treatment for solvent born paints and a different treatment to stabilize the metal for waterborne coatings. Metallic flakes can be copper<\/a> and zinc<\/a>, but most often aluminum<\/a> due to it\u2019s high reflectivity.<\/p>\n

In a properly applied coating, these mirror-like pigments orient parallel to the surface and thus offer optimum reflectance (figure I).\u00a0Leafing aluminum on the other hand is surface modified to “float” the aluminum to the the coating surface and provide the appearance of solid aluminum.<\/p>\n

\"effects\"effectpigments_figureSnell\u2019s Law<\/em><\/strong> states that when incidence light travels through one medium into another, the refracted light may change it\u2019s angle of travel. The refracted angle relative to the incident angle in air is called the Index of refraction. It is these principals that are operative to produce interference pigments<\/em> that produce a myriad number of colors and effects.<\/p>\n

Depending on the platelet or laminar substrate that is employed to deposit another layer onto the substrate as well as the material choice and thickness of the deposited film, a wide variety of special effects can be produced.<\/p>\n

\"effectsPearl Pigments<\/a> can be produced by deposition onto two major classes of substrates, natural and synthetic. Natural substrates include mica and Kaolin<\/a>. Synthetic substrates include alumina<\/a>, borosilicate<\/a>, silica<\/a> and synthetic mica<\/a>. The coating on alumina and silicates is anatase titanium dioxide that may or may not be doped with another metal to create an even greater number of additional colors and special effects.<\/p>\n

Other special effect pigments include luminescent pigments<\/em><\/strong> that emit light (visible, IR or UV) upon suitable excitation, without becoming incandescent. Phosphorescent <\/em><\/strong>pigments<\/em><\/strong> emit light by a luminescent pigment after excitation has ceased (e.g., glow-in-the-dark). Thermochromic<\/em><\/strong> pigments reversibly alter color after exposure to a heat source, and lastly photochromic pigments<\/em><\/strong> reversibly alter color upon exposure to a strong uv light source. Luminescent, phosphorescent, thermochromic and photochromic colorants and pigments are not widely used in decorative coatings applications. They are only used for specialty purpose applications, as they are classified as special effect pigments.<\/p>\n

\"effects<\/p>\n

\"effectpigments_figureFor additional information on other types of pigments, please see “Understanding Corrosion Inhibitive Pigments<\/a>”\u00a0as well as “Inert Pigments \u2013 The Unseen Contributor to Improving Paint Performance<\/a>.”<\/p>\n

1<\/sup> www.handprint.com<\/a><\/p>\n

2<\/sup> www.interempresas.net<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Effect pigments provide an infinite array of colors and effects that enable unlimited design possibilities for coatings.\u00a0These effects include the illusion of flickering lights, metallic reflection, interference sparkle and color variation and luster that changes with the viewing angle and … Continued<\/a><\/p>\n","protected":false},"author":12,"featured_media":4412,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"episode_type":"","audio_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","footnotes":""},"categories":[16],"tags":[],"ppma_author":[1249],"class_list":{"0":"post-4411","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-paint-coatings","8":"entry"},"yoast_head":"\nUsing Effect Pigments for Limitless Coatings Design Possibilities - 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Lewarchik, President and CEO of Chemical Dynamics, LLC, brings 40 years of paint and coatings industry expertise to his role as a contributing author with the Prospector Knowledge Center. As a contributing writer, Ron pens articles on topics relevant to formulators in the coatings industry. He also serves as a consultant for the Prospector materials search engine, advising on issues related to optimization and organization materials within the database. Ron's company, Chemical Dynamics, LLC (www.chemicaldynamics.net), is a full-service paint and coatings firm specializing in consulting and product development based in Plymouth, Michigan. Since 2004, he has provided consulting, product development, contract research, feasibility studies, failure mode analysis and more for a wide range of clients, as well as their suppliers, customers and coaters. He has also served as an Adjunct Research Professor at the Coatings Research Institute of Eastern Michigan University. 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Lewarchik, President and CEO of Chemical Dynamics, LLC, brings 40 years of paint and coatings industry expertise to his role as a contributing author with the Prospector Knowledge Center. As a contributing writer, Ron pens articles on topics relevant to formulators in the coatings industry. He also serves as a consultant for the Prospector materials search engine, advising on issues related to optimization and organization materials within the database. Ron's company, Chemical Dynamics, LLC (www.chemicaldynamics.net), is a full-service paint and coatings firm specializing in consulting and product development based in Plymouth, Michigan. Since 2004, he has provided consulting, product development, contract research, feasibility studies, failure mode analysis and more for a wide range of clients, as well as their suppliers, customers and coaters. He has also served as an Adjunct Research Professor at the Coatings Research Institute of Eastern Michigan University. As such, Ron was awarded a sub-grant from the Department of Energy to develop energy-saving coating technology for architectural applications, as well as grants from private industry to develop low energy cure, low VOC compliant coatings. He taught courses on color and application of automotive top coats, cathodic electro-coat and surface treatment. His experience includes coatings for automotive, coil, architectural, industrial and product finishing. Previously, Ron was the Vice President of Industrial Research and Technology, as well as the Global Director of Coil Coating Technology for BASF (Morton International). During his fourteen-year tenure with the company, he developed innovative coil coating commercial products primarily for roofing, residential, commercial and industrial building, as well as industrial and automotive applications. He was awarded fifteen patents for new resin and coating formulas. From 1974 to 1990, Ron held positions with Desoto, Inc. and PPG Industries. He was the winner of two R&D awards for coatings utilizing PVDF resins, developed the first commercial high solids automotive topcoat and was awarded 39 U.S. patents for a variety of novel technologies he developed. He holds a Masters in Physical Organic Chemistry from the University of Pittsburgh and subsequently studied Polymer Science at Carnegie Mellon University. Ron lives in Brighton, Michigan with his family. 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