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印铁油墨外部的物理环境

1、高温烘烤后油墨变色

1. The color change of ink after high temperature baking

印铁油墨属于热固化油墨,对其技术要求其中一条就是高温烘烤后颜色不变。但在实际生产中,有些色相的油墨经烘烤后还是或多或少有些变色,例如,白墨、冲淡墨以及用大量白墨、冲淡墨调配而成的墨等,这些油墨经多次烘烤会发生黄变,尤其是用大量冲淡剂调配出的专色墨,多次烘烤后颜色变化会很大。例如,用大量冲淡剂加入蓝墨调配而成的浅蓝专,多次烘烤后浅蓝专可能变成深蓝专。工艺策划者在制定印刷工艺时就应该充分考虑,尽量把这些京多次烘烤变色的油墨放在最后印刷。

Heat curing ink printing ink, belonging to the technical requirement, one of which is the same color after high temperature baking. But in practice, some color ink through the baking after more or less in some color, such as white ink, ink and dilute with plenty of white ink, dilute ink mixing ink, the ink will occur after repeated baking yellowing, especially with a large number of the deployment of a dilute ink agent, baking after the color change will be great. For example, with a large amount of diluent adding blue ink mix into blue, light blue after baking may become blue specially designed. The craft planner should take full consideration when making the printing process, and try to put the inks which are bake many times in the final printing.

2上光前后颜色变化

2 color changes before and after the glazing

印刷最后一道工序是上光油,上光油的目的一是为了保护图案,防止损伤;二是提高光泽度,增加美观。一般来说,印铁光油经高温烘烤后都会黄变,加之光油层对光的反射率变大,所以上光后油墨的颜色一般会比上光前亮些。但是有些光油含有增白剂,在光照下显蓝色,因此使用这种光油的产品上光后油墨颜色会比原来偏蓝,总体色相是油墨本身颜色与光油偏蓝色的叠加。

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The last process of printing is the polish oil. The purpose of the polish is to protect the pattern and prevent the damage; two is to improve the gloss and increase the beauty. In general, the printing of light oil by high temperature after curing are yellowing, and the light oil to light reflectivity increases, so after glazing ink color will generally be brighter than before polishing. However, some gloss oils contain brighteners, which are blue in the light. Therefore, after using the varnish, the ink color will be more blue than the original. The overall hue is the superposition of the color of the ink itself and the gloss of the gloss.

3、金属色专色油墨氧化后颜色变化

3. Color change of metal color special ink after oxidation

印铁金、银墨是由金、铝等金属粉末来显色的。其中印铁金墨是由经研磨加工的铜粉调制而成的印刷油墨;印铁银墨是由经研磨加工的铝粉调制而成的油墨。印铁金、银墨中金银粉的化学性能一般不够稳定,当遇到酸、碱、水汽、硫化物气体和碳酸气体时,就会产生化学反应,使印品墨色缺乏金属色泽。其中金属的变色规律是由金黄色变成棕红色,继而变成偏黑色。因为铜在初氧化时可生成红色氧化亚铜,进一步氧化后便变成黑色氧化铜;此外,金粉在含碳酸气较浓及湿气较大的工艺条件下,容易变成碱式碳酸铜,于是印品上的金墨遍逐渐变暗。银墨变色之后则成偏灰色,缺乏银光金属质感。

Printing gold and silver ink is made of gold, aluminum and other metal powder to color. The printing gold ink is printing ink by copper powder grinding and modulation; tin silver ink is composed of aluminum powder after grinding and modulation of ink. The chemical properties of gold and silver powder printing gold and silver ink in general is not stable enough, when the acid and alkali, water vapor, gas and sulfide carbonate gas, will produce a chemical reaction, the lack of metal color printing inks. The law of discoloration of metals is from gold to brown and then to black. Because copper can be generated in the early red cuprous oxide oxidation, after further oxidation into black copper oxide; in addition, gold powder in carbonated thick and high moisture conditions, easy to become a basic copper carbonate, and gold ink printing on the times gradually darken. After the color of the silver and ink, it becomes gray and lacks the silver metal texture.

4、印刷墨层厚度不同

4. The thickness of the printing ink layer is different

我们知道,同一个油墨印刷厚度不同,其表现出来的颜色也不同。在实际印刷中,墨层的厚度是靠印刷压力和墨量多少来控制的,一般来说,印刷压力调节合理后是不会改变的,因此,印刷中墨层的厚度和均匀性是通过控制墨量多少来实现的。国内大多数印铁机还是靠手工调节给墨量螺丝来控制给墨量的,由于人为调节受到很多因素的影响,所以印刷出的墨层可能厚度不均匀,油墨的颜色也会深浅不一,色相与标准色稿有差异。

We know that the same ink printing thickness is different, and the color is different. In actual printing, the thickness of the ink layer is controlled by the printing pressure and the amount of ink. Generally speaking, after adjusting the printing pressure reasonably, it will not change. Therefore, the thickness and uniformity of the ink layer is achieved by controlling the amount of ink. Most of the domestic printing machine or by hand to adjust the amount of ink to the inking screw to control, because artificial adjustment is influenced by many factors, so that the printing ink layer may have uneven thickness, ink color will be shades of color and color difference standard draft.

本文由济南画册印刷进行编写,想要了解更多的产品及更详细的精彩内容,请关注我们的官方网站: http://www.sdyszb.com 您的惠顾是对我们很大的支持。

This article is compiled by Ji'nan pictorial Printing. If you want to know more products and more detailed highlights, please pay attention to our official website: http://www.sdyszb.com, your patronage is very supportive for us.


 
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