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BuKePrinting >> Bookprinting >> 印刷出現著墨不良的原因

印刷出現著墨不良的原因

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-15 | 489 Views | Share:
如果不是版材感光膠的感光劑含量過低引起的不上墨,那麽就應從印版的著墨率與曝光時間、顯影液濃度的關系來查找原因曝光時間過長或顯影液濃度過大,容易出現印版著墨率不良的情況。因為PS版的曝光感光層,不是絕對溶或絕對不溶的,而是介於兩者之間,如果控制不好,就會使印版的感光層該溶的溶,不該溶的也溶。脫墨率增高,著墨不良。

印刷出現著墨不良的原因

如果不是版材感光膠的感光劑含量過低引起的不上墨,那麽就應從印版的著墨率與曝光時間、顯影液濃度的關系來查找原因曝光時間過長或顯影液濃度過大,容易出現印版著墨率不良的情況。因為PS版的曝光感光層,不是絕對溶或絕對不溶的,而是介於兩者之間,如果控制不好,就會使印版的感光層該溶的溶,不該溶的也溶。脫墨率增高,著墨不良。

另外,以下幾種情況也會造成印版著墨不良:如果保護膠不合要求,膠液過濃,手工塗膠不勻;印版的乾燥溫度過高或過低,也會造成吸墨性差或成膜性能差;在塗膠後印版接觸了強光;製版後印版在高溫高濕的環境下存放,此時,應該使用版材指定的保護膠,適當稀釋膠液,合理確定乾燥溫度,一般應在60C左右;塗膠後應防止光照,並將制好的印版存放在合格的環境下。


如果在印刷的過程中發現印版著墨不良,則應檢查是否是潤濕液中的膠液成分過多,或者在使用清洗劑之後,沒有用水沖洗。

印刷出現著墨不良的原因
印刷出現著墨不良的原因

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