“Screening” is the name of this process. Screening breaks down continuous tones into halftone dots. Line screen (measured in LPI, or lines per inch) determines the fineness of the screening: a higher line count results in finer dots and a more detailed image, while a lower line count results in coarser dots and a rougher image.<\/p>\n
If you examine a printed piece under a magnifying glass, you will see that the colors are not simply “printed” on as solid blocks but are formed by an arrangement of tiny dots\u2014known as halftone dots. This article explains the essentials of halftone dots, offering an insider’s perspective on the printing process.<\/p>\n
However, high line counts come with prerequisites. Fine, detailed imagery requires smooth paper and high-precision printing equipment; rough paper absorbs ink unevenly, causing high-line-count prints to blur. For rough materials like corrugated cardboard, the line count must be lowered, which naturally results in less image detail.<\/p>\n
The halftone dot is the fundamental unit of printing. Continuous-tone colors are reproduced by overprinting dots of varying sizes; while the naked eye perceives a smooth image, magnification reveals a pattern of dots. The arrangement and density of these dots determine the image’s level of detail.<\/p>\n
Halftone dot quality is determined at the design stage. Images require a resolution of 300 dpi; scaling alters the effective resolution, and if the source image is poor, even the best printing process cannot salvage it. Getting the file right during the design phase creates the necessary foundation for a high-quality print.<\/p>\n
Common issues include moir\u00e9 patterns, dot loss, and color shifts. Moir\u00e9 patterns arise from improper screening angles; dot loss is typically caused by pressure or ink issues; and color shifts are often linked to dot gain. These problems are usually identified during the proofing stage and can be resolved through color matching and press adjustments.<\/p>\n
Halftone dots are the “pixels” of printing. When dots are well-controlled, the image is crisp and detailed; poor control causes even the best designs to blur into an indistinct mess.<\/p>\n
Gradients and tonal depth rely on variations in dot density. A transition from dark to light is achieved by shifting from dense to sparse dot patterns, while rich tonal depth requires precise control over dot size and angle. Abrupt transitions between dark and light areas often indicate inadequate dot control.<\/p>","protected":false},"excerpt":{"rendered":"
“Screening” is the name of this process. Screening breaks down continuous tones into halftone dots. Line screen (measured in LPI, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-1177","post","type-post","status-publish","format-standard","hentry","category-packaging-knowledge"],"_links":{"self":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/comments?post=1177"}],"version-history":[{"count":1,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1177\/revisions"}],"predecessor-version":[{"id":1178,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1177\/revisions\/1178"}],"wp:attachment":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/media?parent=1177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/categories?post=1177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/tags?post=1177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}