{"id":336,"date":"2022-11-18T22:19:26","date_gmt":"2022-11-18T22:19:26","guid":{"rendered":"http:\/\/www.unigraphinternational.ca\/?post_type=unigraph_soutien&p=336"},"modified":"2022-11-22T13:32:08","modified_gmt":"2022-11-22T13:32:08","slug":"print-density-control","status":"publish","type":"unigraph_soutien","link":"https:\/\/www.unigraphinternational.com\/en\/soutien\/print-density-control\/","title":{"rendered":"Print density control"},"content":{"rendered":"

TROUBLESHOOTING FOR SHEETFED AND WEB PRESSES<\/h4>\n

Print density control :\u00a0Colour variation from sheet to sheet<\/p>\n\n\n\n\n\n\n\n\n\n\n
Causes<\/th>\nRemedies<\/th>\n<\/tr>\n
Poor rollers or roller settings.<\/td>\nCheck rollers for distortion and replace if necessary. Assure that all rollers are set to manufacturer\u2019s specs.<\/td>\n<\/tr>\n
Poor ink\/water balance.<\/td>\nSee INK\/WATER BALANCE section in this guide.<\/td>\n<\/tr>\n
Low ink level in the fountain.<\/td>\nKeep ink fountain full to maintain equal pressure<\/td>\n<\/tr>\n
Ink emulsification.<\/td>\nDecrease water or add heavy body varnish.<\/td>\n<\/tr>\n
Ink backing away from \u201cfountain\u201d roller.<\/td>\nAgitate ink in fountain or increase the ink flow.<\/td>\n<\/tr>\n
Rollers stripping.<\/td>\nSee ROLLERS STRIPPING section in this guide.<\/td>\n<\/tr>\n
Contaminated ink fountain \u2013 dust, grit, etc. at the ink blade\/roller nip.<\/td>\nRemove ink, clean fountain, replace with fresh ink.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

TROUBLESHOOTING FOR SHEETFED AND WEB PRESSES Print density control :\u00a0Colour variation from sheet to sheet Causes Remedies Poor rollers or roller settings. Check rollers for distortion and replace if necessary. Assure that all rollers are set to manufacturer\u2019s specs. Poor ink\/water balance. See INK\/WATER BALANCE section in this guide. Low ink level in the fountain. 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Assure that all rollers are set to manufacturer\u2019s specs. Poor ink\/water balance. See INK\/WATER BALANCE section in this guide. Low ink level in the fountain. 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