{"id":1299,"date":"2020-12-03T03:28:18","date_gmt":"2020-12-03T03:28:18","guid":{"rendered":"http:\/\/learnlearn.uk\/alevelcs\/?page_id=1299"},"modified":"2022-01-28T05:28:50","modified_gmt":"2022-01-28T05:28:50","slug":"laser-printer-works","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/","title":{"rendered":"How a Laser Printer Works"},"content":{"rendered":"<div class=\"responsive-tabs\">\n<h2 class=\"tabtitle\">Intro<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Introduction<\/h3>\n<p>Laser printers are a type of printer that are widely used in offices and schools.<\/p>\n<p><strong>Main uses<\/strong><\/p>\n<ul>\n<li>Offices<\/li>\n<li>Schools<\/li>\n<li>Shop POS printers<\/li>\n<\/ul>\n<p><strong>Advantages<\/strong><\/p>\n<ul>\n<li>Very fast printing<\/li>\n<li>Cheap to print out large volumes<\/li>\n<li>Due to the fusing process the toner does not run if the paper gets wet.<\/li>\n<\/ul>\n<p><b>Disadvantages<\/b><\/p>\n<ul>\n<li>More expensive to buy the printer than inkjet and the toner cartridges are more expensive to buy.<\/li>\n<\/ul>\n<h3>How a laser printer works<\/h3>\n<div class=\"nv-iframe-embed\">\n<div class=\"container-lazyload preview-lazyload container-youtube js-lazyload--not-loaded\"><a href=\"https:\/\/www.youtube.com\/watch?v=Y_KDRxi_6YQ\" class=\"lazy-load-youtube preview-lazyload preview-youtube\" data-video-title=\"How A laser Printer Works\" title=\"Play video &quot;How A laser Printer Works&quot;\">https:\/\/www.youtube.com\/watch?v=Y_KDRxi_6YQ<\/a><noscript>Video can&#8217;t be loaded because JavaScript is disabled: <a href=\"https:\/\/www.youtube.com\/watch?v=Y_KDRxi_6YQ\" title=\"How A laser Printer Works\">How A laser Printer Works (https:\/\/www.youtube.com\/watch?v=Y_KDRxi_6YQ)<\/a><\/noscript><\/div>\n<\/div>\n\n<\/div><h2 class=\"tabtitle\">Rasterize<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 1 &#8211; Raster image processing<\/h3>\n<p>In this step the document to be printed is converted to a page description language ready for previewing on the computer. This is then converted to a raster image specific to the printer&#8217;s needs and is then transmitted to the printer&#8217;s raster memory, ready for printing.<\/p>\n<p>The raster image is similar to a bitmap file, showing what colour is to be printed at each exact position on the page.<\/p>\n<p><a href=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-1300\" src=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing.png\" alt=\"\" width=\"960\" height=\"211\" srcset=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing.png 960w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing-300x66.png 300w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing-768x169.png 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Charge<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 2 &#8211; Charging<\/h3>\n<p>The printer drum is given a negative charge by the primary charge roller. This means that the entire drum has a uniform negative charge.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-2221\" src=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-charge-drum.png\" alt=\"\" width=\"572\" height=\"387\" srcset=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-charge-drum.png 863w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-charge-drum-300x203.png 300w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-charge-drum-768x520.png 768w\" sizes=\"(max-width: 572px) 100vw, 572px\" \/><\/p>\n\n<\/div><h2 class=\"tabtitle\">Expose<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 3 &#8211; Exposing<\/h3>\n<p>A precise laser scans across the drum as it is rotating, removing the charge in any areas where toner is required on the paper, leaving the areas that don&#8217;t require toner with a negative charge.<\/p>\n<div id=\"attachment_2222\" style=\"width: 539px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/en.wikipedia.org\/wiki\/File:Laser_printer-Writing.svg\"><img aria-describedby=\"caption-attachment-2222\" decoding=\"async\" loading=\"lazy\" class=\" wp-image-2222\" src=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printing-writing-1024x871.png\" alt=\"\" width=\"529\" height=\"450\" srcset=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printing-writing-1024x871.png 1024w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printing-writing-300x255.png 300w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printing-writing-768x653.png 768w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printing-writing.png 1058w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><\/a><p id=\"caption-attachment-2222\" class=\"wp-caption-text\">Source: Dale Mahalko, Wikipedia<\/p><\/div>\n\n<\/div><h2 class=\"tabtitle\">Develop<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 4 &#8211; Developing<\/h3>\n<p>The drum rotates down towards the toner hopper and any areas that are no longer negatively charged attract toner and it sticks to the drum.<\/p>\n<div id=\"attachment_2223\" style=\"width: 760px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/en.wikipedia.org\/wiki\/File:Laser_printer_fusing.svg\"><img aria-describedby=\"caption-attachment-2223\" decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-2223\" src=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printer-igcse-process-1024x526.png\" alt=\"\" width=\"750\" height=\"385\" srcset=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printer-igcse-process-1024x526.png 1024w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printer-igcse-process-300x154.png 300w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printer-igcse-process-768x394.png 768w, https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/laser-printer-igcse-process.png 1200w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><p id=\"caption-attachment-2223\" class=\"wp-caption-text\">Source: WIkipedia<\/p><\/div>\n\n<\/div><h2 class=\"tabtitle\">Transfer<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 5 &#8211; Transferring<\/h3>\n<p>Paper is fed through the drum as it is turning and because the latent charge on the drum is weaker than the charge on the paper, the toner is attracted to the paper and is transferred.<\/p>\n\n<\/div><h2 class=\"tabtitle\">Fuse<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 6 &#8211; Fusing<\/h3>\n<p>The paper then passes through a heating element, that melts the plastic coating on the toner, and then pressure is applied to the paper, fusing the toner firmly to the paper.<\/p>\n\n<\/div><h2 class=\"tabtitle\">Clean<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Step 7 &#8211; Cleaning and recharging<\/h3>\n<p>Finally the roller is cleaned of any left over toner and a charge roller reapplies a uniform negative charge to the drum once again.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Resources<\/h2>\n<div class=\"tabcontent\">\n\n<p><strong>Past Paper Questions<\/strong><\/p>\n<p>June 17 Paper 11 Qn2<\/p>\n<p>&nbsp;<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Laser printers are a type of printer that are widely used in offices and schools. Main uses Offices Schools Shop POS printers Advantages Very fast printing Cheap to print out large volumes Due to the fusing process the toner does not run if the paper gets wet. Disadvantages More expensive to buy the printer&hellip;&nbsp;<a href=\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">How a Laser Printer Works<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"on","neve_meta_content_width":80,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How a Laser Printer Works - A Level Computer Science<\/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:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How a Laser Printer Works - A Level Computer Science\" \/>\n<meta property=\"og:description\" content=\"Introduction Laser printers are a type of printer that are widely used in offices and schools. Main uses Offices Schools Shop POS printers Advantages Very fast printing Cheap to print out large volumes Due to the fusing process the toner does not run if the paper gets wet. Disadvantages More expensive to buy the printer&hellip;&nbsp;Read More &raquo;How a Laser Printer Works\" \/>\n<meta property=\"og:url\" content=\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\" \/>\n<meta property=\"og:site_name\" content=\"A Level Computer Science\" \/>\n<meta property=\"article:modified_time\" content=\"2022-01-28T05:28:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\",\"url\":\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\",\"name\":\"How a Laser Printer Works - A Level Computer Science\",\"isPartOf\":{\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#website\"},\"datePublished\":\"2020-12-03T03:28:18+00:00\",\"dateModified\":\"2022-01-28T05:28:50+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"A Level Computer Science Home\",\"item\":\"https:\/\/learnlearn.uk\/alevelcs\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How a Laser Printer Works\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#website\",\"url\":\"https:\/\/learnlearn.uk\/alevelcs\/\",\"name\":\"A Level Computer Science\",\"description\":\"CIE Specification\",\"publisher\":{\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/learnlearn.uk\/alevelcs\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#organization\",\"name\":\"A Level Computer Science\",\"url\":\"https:\/\/learnlearn.uk\/alevelcs\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2019\/09\/LearnLearnLogowhite.png\",\"contentUrl\":\"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2019\/09\/LearnLearnLogowhite.png\",\"width\":710,\"height\":98,\"caption\":\"A Level Computer Science\"},\"image\":{\"@id\":\"https:\/\/learnlearn.uk\/alevelcs\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How a Laser Printer Works - A Level Computer Science","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/","og_locale":"en_GB","og_type":"article","og_title":"How a Laser Printer Works - A Level Computer Science","og_description":"Introduction Laser printers are a type of printer that are widely used in offices and schools. Main uses Offices Schools Shop POS printers Advantages Very fast printing Cheap to print out large volumes Due to the fusing process the toner does not run if the paper gets wet. Disadvantages More expensive to buy the printer&hellip;&nbsp;Read More &raquo;How a Laser Printer Works","og_url":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/","og_site_name":"A Level Computer Science","article_modified_time":"2022-01-28T05:28:50+00:00","og_image":[{"url":"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2020\/12\/Untitled-drawing.png"}],"twitter_card":"summary_large_image","twitter_misc":{"Estimated reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/","url":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/","name":"How a Laser Printer Works - A Level Computer Science","isPartOf":{"@id":"https:\/\/learnlearn.uk\/alevelcs\/#website"},"datePublished":"2020-12-03T03:28:18+00:00","dateModified":"2022-01-28T05:28:50+00:00","breadcrumb":{"@id":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/learnlearn.uk\/alevelcs\/laser-printer-works\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"A Level Computer Science Home","item":"https:\/\/learnlearn.uk\/alevelcs\/"},{"@type":"ListItem","position":2,"name":"How a Laser Printer Works"}]},{"@type":"WebSite","@id":"https:\/\/learnlearn.uk\/alevelcs\/#website","url":"https:\/\/learnlearn.uk\/alevelcs\/","name":"A Level Computer Science","description":"CIE Specification","publisher":{"@id":"https:\/\/learnlearn.uk\/alevelcs\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/learnlearn.uk\/alevelcs\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/learnlearn.uk\/alevelcs\/#organization","name":"A Level Computer Science","url":"https:\/\/learnlearn.uk\/alevelcs\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/learnlearn.uk\/alevelcs\/#\/schema\/logo\/image\/","url":"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2019\/09\/LearnLearnLogowhite.png","contentUrl":"https:\/\/learnlearn.uk\/alevelcs\/wp-content\/uploads\/sites\/20\/2019\/09\/LearnLearnLogowhite.png","width":710,"height":98,"caption":"A Level Computer Science"},"image":{"@id":"https:\/\/learnlearn.uk\/alevelcs\/#\/schema\/logo\/image\/"}}]}},"rttpg_featured_image_url":null,"rttpg_author":{"display_name":"learnlearnadmin","author_link":"https:\/\/learnlearn.uk\/alevelcs\/author\/learnlearnadmin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Introduction Laser printers are a type of printer that are widely used in offices and schools. Main uses Offices Schools Shop POS printers Advantages Very fast printing Cheap to print out large volumes Due to the fusing process the toner does not run if the paper gets wet. Disadvantages More expensive to buy the printer&hellip;&nbsp;Read&hellip;","_links":{"self":[{"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/pages\/1299"}],"collection":[{"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/comments?post=1299"}],"version-history":[{"count":8,"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/pages\/1299\/revisions"}],"predecessor-version":[{"id":2225,"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/pages\/1299\/revisions\/2225"}],"wp:attachment":[{"href":"https:\/\/learnlearn.uk\/alevelcs\/wp-json\/wp\/v2\/media?parent=1299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}