Overview
PS plates (presensitized plates) are fundamental components in modern offset printing systems. These plates consist of an aluminum substrate coated with photosensitive emulsion layers that react to ultraviolet light during plate exposure. The technology enables precise image transfer from digital files to printing surfaces, making it indispensable for commercial printing operations. First developed in the 1950s, PS plates revolutionized the printing industry by offering superior consistency and efficiency compared to traditional plate-making methods. Contemporary versions feature advanced photopolymer coatings that support high-resolution printing up to 300 lpi (lines per inch), with some specialized plates capable of over 1 million impressions.
Physical and Chemical Properties
Standard PS plates utilize high-purity aluminum (99.5%) substrates typically ranging from 0.15mm to 0.30mm in thickness. The surface undergoes electrochemical graining to create microscopic cavities that enhance water retention during printing. A thin oxide layer (approximately 3μm) provides corrosion resistance and improves coating adhesion. The light-sensitive coatings typically contain diazo compounds or photopolymers that polymerize upon exposure to UV light (350-450nm wavelength). Unexposed areas remain soluble and are removed during development. Modern plates demonstrate excellent chemical resistance to common printing fountain solutions with pH values between 4.5 and 5.5.
Main Applications
PS plates serve as the primary imaging medium for sheet-fed and web offset presses across multiple industries. In commercial printing, they produce magazines, catalogs, and brochures with exceptional color fidelity. Packaging converters rely on them for folding cartons, labels, and flexible packaging, often requiring specialized plates with enhanced ink transfer properties. The newspaper industry utilizes thermal PS plates for high-speed web presses, capable of handling up to 150,000 impressions per hour. Specialty applications include UV-curable ink printing plates and waterless plates for environmentally sensitive operations. Emerging hybrid plates combine conventional offset performance with digital imaging capabilities for short-run applications.
Safety and Storage
Proper handling of PS plates requires attention to both the plates themselves and associated processing chemicals. Unexposed plates are sensitive to UV light and must be stored in light-tight packaging under controlled humidity (40-60% RH). Prolonged exposure to temperatures above 30°C can cause premature aging of the photosensitive coating. Processing involves alkaline developers (pH 12-13) that require appropriate PPE including gloves and eye protection. Waste developer solutions containing dissolved coating materials must be neutralized before disposal according to local environmental regulations. Aluminum plate recycling programs are widely available, with recovery rates exceeding 95% in many markets.
B2B Procurement Guide
Professional buyers should evaluate PS plates based on five critical parameters: resolution capability (measured in lpi), exposure speed, chemical resistance, run length durability, and dot reproduction accuracy. Thermal plates generally offer superior run lengths (1M+ impressions) compared to conventional UV plates (100-300K impressions). Leading manufacturers include Fujifilm, Kodak, Agfa, and Heidelberg, each offering proprietary coating technologies. Consider ordering sample packs to test plate performance with your specific press conditions. Bulk purchases (pallet quantities) typically secure 15-25% discounts, though minimum order quantities vary by supplier. Just-in-time inventory systems help mitigate storage-related quality issues.
Related Manufacturers
- 主营：废铜回收、废铝回收、废铁回收、废ps版回收、废不锈钢回收、回收废电线电缆、废模具回收、镀金镀银回收、废锡渣回收、废白铜回收、FPC回收、印刷ctp版回收、铜镀金回收、废线路板回收、led灯珠回收、废电路板回收、废电缆线回收、pcb板回收、废电线回收、废镀金回收、电子废料回收、ic芯片回收、贵金属回收、稀有金属回收、废金属回收
- 主营：工业垃圾处理、整厂回收、废旧物资回收、回收废旧ps版、废电缆电线回收、再生资源回收、工厂固废处置
- 主营：废黄铜、废铝模、红铜块、ups电源、铝模具、客车韶、快充桩、承重架、回收车、电缆线、铁刨丝、电子板、废铜丝、纯铜线、废金属、排山管、回收电、废电线、边角料、配电柜、废模具、废电子、旧部标、服务器、废铜线
- 主营：铝型材、废黄铜、废强磁、废ctp版、废钢管、废锌渣、锌合金、废槽钢、废菲林、铝合金、电缆线、模具铁、工字钢、废角铁、铜电缆、废铜粉、报纸板、废红铜、变压器、废铁板、废电机、废钢材、铝板废、红铜粉、废马达
- 主营：润版液、橡皮布、水斗液、印刷版材、洗车水、洗皮水、润湿粉、印刷油墨、除钙剂、水性光油、火神橡皮布、印刷喷粉、赛飞扬润版液、日研润版液、维格拉润版液、博星润版液、洁版液、水辊清洗剂、印刷水绒套、修版笔、橡皮还原剂、油墨搅拌机
- 主营：压饼机、铝屑压饼机、铁屑压饼机、印刷ps版材撕碎机、屑饼机、压块机、三向金属打包机、门盖式打包机、料斗式打包机、打包机、铝屑脱油机、铜屑脱油机、撕碎机、破碎机、粉碎机、双轴破碎机、锤式破碎机、液压双轴破碎机、断桥铝破碎方案、再生铝破碎分选机、汽车外壳打包机、锂电池破碎生产线、汽车壳破碎分选方案、全自动卧式打包机、刨花机、套袋机
- 主营：工业酒精、无水乙醇、洗板水、异丙醇、香蕉水、天那水、稀释剂、洗网水、脱脂剂、脱漆剂、工业清洗剂、去渍油、白电油、石油醚、电子级甲醇、电子级异丙醇
- 主营：过线辊、开槽胶辊、工业胶辊、聚氨酯辊、辊轮包胶、印刷胶辊、硅胶胶辊、橡胶包胶辊、聚氨酯胶辊、覆膜橡胶辊、聚氨酯印刷辊、聚氨酯包胶辊、工业机械包胶辊
- 主营：1050铝板、1050铝棒、1100铝管、1070铝卷、3003铝板、3004铝棒、3A21铝卷、5052铝管、5083铝板、5005铝棒、5754铝管、5086铝卷、6061铝板、6063铝板、2024铝板、7075铝管、7A04铝卷、2A14铝卷、6082铝卷、6005A铝型材、6101铝棒、2A12铝管、5A06铝锻件、容器板、幕墙加工
- 主营：冲版机、烤版机、留版机、十字对位套准打孔弯版机、海德堡打孔机、罗兰打孔机、小森打孔机、高宝打孔机、TY-200PB打孔机、唐印预装纸装置、海德堡预装纸、小森预装纸