Category Archives: Printing And Finish

Get Inspired to choose the appropriate printing anf finish methods for your packaging design.

UV印刷

UV印刷包装

UV胶印,分为彩色印刷和表面整饰两类。彩色印刷和传统常规印刷原理基本相同,表面整饰处理分为局部UV上光和全面UV上光。

全面和局部UV上光

局部UV:对印刷品表面特定区域的文字,图形(通常为客户的LOGO)UV上光,以达到强调突出的目的。

全面UV:对整个印刷品表面进行UV上光。

全面UV上光后,印刷品表面的光泽度可以和覆亮膜相媲美,并且在视觉效果上超越亮膜处理,可以用来替代亮膜处理。尤其当印刷品,包装品表面局部需要手写,或者盖章,而且客户对表面光泽度具有较高要求的时候,局部UV是唯一的选择。

2014年末的时候,我们为一个法国客户做一批挂历,客户希望挂历的封面既具有亮膜处理的高光效果,同时又能在右下角的地方写字盖章,我们就是通过大幅面局部UV的方式来满足客户的要求,客户收到样品后非常喜欢,很快就下单了。

传统胶印与UV印刷的区别

UV印刷与传统的胶印技术有着很大的区别,尤其在油墨的干燥方面。UV胶印油墨在高能量紫外光照射下迅速固化,油墨干燥所需的时间不到一秒,然而传统的单张纸胶印油墨需要几个小时才能完全干燥。

对于传统的胶印技术,印刷油墨的干燥途径主要有三种,挥发,渗透吸收,氧化聚合。

  • 挥发干燥:印刷油墨中的溶剂挥发到空气中,颜料固着到纸材表面。相对于UV印刷,UV油墨的快速干燥大大减少了有害气体的挥发,更加符合环保标准。
  • 渗透吸收:印刷油墨中的溶剂渗透吸收到到承印的纸材当中,油墨的粘度提高,颜料固着到纸张或纸板表面。塑料膜或胶片,金银卡纸由于没有渗透吸收性能,油墨无法有效快速干燥,传统的胶印工艺无法适用于这些承印物。同时,未经涂布纸板表面有着过多过大的微细毛孔,对油墨中的溶剂具有超强的吸收能力,这也导致印刷色彩不能很好地呈现。然而,UV印刷独特的光学干燥机制使其承印范围大大增加,即使在塑料膜,胶片,金银卡纸,未经涂布的纸材上面也能获得极佳的印刷效果。
  • 氧化聚合:印刷油墨中的调墨油氧化聚合,油墨粘度提高,颜料固着干燥。

传统胶印油墨干燥方式

UV印刷的优点

相对传统的胶印工艺,UV印刷有以下优点:

  • 1. 超级的光泽度,出色的高光,或者哑光效果,色彩饱满,光泽艳丽。
  • 2. 超级的耐磨性,有效保护印刷表面油墨色彩,防止刮痕。
  • 3. 愉悦的手感。
  • 4. 环保,不含溶剂,不产生挥发有害气体,减少空气污染。
  • 5. 不需要喷粉,减少印刷故障,保护环境。
  • 6. 适应于各种承印物,即使在透明塑料膜,胶片,未涂布的纸张,卡纸,PET金银卡纸上面也可以获得优质的印刷效果。
  • 7. 油墨干燥固化迅速,缩短生产周期,提高生产效率

UV印刷存在的问题:

1. 印刷成本高:设备价格高;UV油墨是普通油墨价格的4到5倍;UV印刷操作工人工资高

2. 专用的配套装置:印刷机必须配备专用的胶辊,印版,橡胶布,清洗剂和UV油墨固化干燥装置。

3. 技术含量高,工艺复杂难点多:首先,水墨平衡不易把控,容易造成严重的油墨乳化,脏版;其次,油墨固化程度不易掌握;第三,对色序要求程度高,安排不当会影响色彩饱和度。

UV印刷在包装领域中的应用

紫外线能量干燥油墨不含致癌物质,不会引起系统毒性,食品包装是UV印刷的最大应用领域。UV印刷广泛应用于折叠纸盒,冰激凌盒,CD/DVD标签和屋型盒。

局部UV应用实例

下面是一张LOGO局部UV的哑膜名片,400克双铜,尺寸85*55cm,图片左上角最上面的蝴蝶为局部UV部分。

带局部UV的哑膜纸盒,纸袋

Shanghai DE Printed Box是一家专注于生产各种高档彩盒,纸袋的印刷包装服务公司,公司90%的产品出口欧美,澳洲各国,详情咨询: 张先生,QQ:630094561。

8 Top China Plastic Packaging Products Manufacturers

In DE Printed Box, we are dedicated to the manufacture of the paper printed packaging products, like 6 pack beer bottle carriers, corrugated printed mailer box, and etc. However, sometimes our clients needs a PET, PVC clear folding box or a paper box with the PVC window or PET sleeves. Then our purchasing department orders the PET boxes, materials, and sleeves from the other plastic packaging companies. Recently we made a wide reserch of the top plastic packaging companies in China and list them below.

clear plastic folding box, pvc, pet box

1. Shenzhen Changfeng Plastic Packing Products Co., Ltd

Founded in 2014, Changfeng Plastic Packing is dedicated to the production of the plastic packaging products made of PET, PVC and PP. The packaging products included printed PET, PVC, PP boxes, Transparant boxes, Voltage bags, and plastic folders. The company is ISO9001/2008 certified and is a SGS Audited supplier. 60% of its product are exported to European countries.

2. Qunli Box

With around 20 years’ production experience, the Qunli Box company passed the ISO9001/2000 quality management system and has the high-end printing pressES like Heidelberg CP2000 Six Color UV Printing Press, Heidelberg CD-102 6+1 UV Printing Press. The main products in cludes all kinds of transparant plastic folding boxes like PP, PVC, PET, APET printed boxes.

3. Wanli Printing(Wanli Plastic Packing)

Wanli‘s clients include Disney, L’Oreal, St. Malone and King Group, which are all very famous brands in the world. The color printed plastic folding boxes are widely used in the packaging of baby products, gifts, electronics, toys, and etc.

4. New Hip Lik

The company has over 40 years production experience of clear packaging boxes. It is a gloabl leading manufacturer of the clear plastic packaging products.In 2013, Hip Lik successfully went through the assessments of C-TPAT audit and passed for the audit requirement with “Best Practice” result.

5. Henghui Packaging Products

Located in Donguan city, Henghui Packaging is a Hong Kong invested printed packaging company. The company got the ISO9001:2000 certification in 2002 from the Britain CCAS company. All the products conforms to the EU RoHS and EN71 standard.

6. Yi Jian Xing Glue Box

Yi Jian Xing is a professional clear box manufacturer in Zhongshan City and passed the ISO 9001:2000 quality management system certification. It specializes in plastic transparent box, cylinder or crimping cylinder by PVC/PP/PET/PTEG.

7. Shanghai Leier Printing

The main products are PVC folding box, transparent folding box, PET box, PP box, gold and silver card, PVC packaging boxes, high-grade cosmetics box, transparent box, packing box, pet signs, L shaped folder, advertising fan, POP and other special packaging products.

8. Sinyu Plastic Packaging

Shenzhen Sinyu Plastic Packaging is a branch company of the Sanyu Group, which is dedicated to manufacture and development the clear plastic packaging boxes. The company has over 400 workers with the facility around 40,000 square meters in total. The plastic packaging products include printed APET, PET, RPET, PVC, PP, PS, PC, EVA boxes and folding boxes.

CTP Technology in the Modern Offset Printing Process

What is CTP?

In the traditional Offset printing process, the print design is output to the photographic film first, then the printing plate(mainly PS plate) is made. Therefore, this imaging technology is also referred to as CTF, computer to film. However, things are quite different now. In the modern printing facility, the artwork, usually in the PDF format created by the Adobe Photoshop, Adobe Illustrator, Adobe Indsign and other desktop layout applications is output directly onto the printing plate. And this tech is called CTP.

CTP Technology

CTP tech varies with the construction type of the imagesetter and the light source used to expose the plate surface. In terms of imagesetter, there are three different kinds: internal drum, external drum and flat-bed imagesetters. And the light used to expose the printing plate are mainly ultraviolet light lamps and laser diodes. The wavelength and energy of the laser diodes depend on used plate types.

CTP Plate Category

There are mainly 3 types: Photopolymer CTP plates, Silver Halogan CTP plates, and Thermal plates.

Advantages of the CTP Plate

CTP has several advantages over conventional platemaking. In CTP, one generation (transfer of film image to the printing plate) is removed from the printing process (eliminating the need for film and related developer chemicals), increasing sharpness and detail. CTP avoids potential losses in quality that may occur during film processing, including scratches in the film, and variations in the exposure. An imagesetter usually has an accuracy rate of +/-2%. Plates are produced in less time, are more consistent, and at a lower cost. CTP can also improve registration and image-to-edge repeatability over traditional methods.

In CTP, the media is registered (held in precise position) in the platesetter during imaging, and does not rely on a separately-aligned pin grid, as is the case with film. Defects due to dust, scratches or other artifacts are minimized.

CTP systems can significantly increase plate production outputs. Platesetters for newspaper production can output up to 300 12-inch (300 mm) plates per hour at 1270 DPI (dots per inch), whilst for commercial applications a CTP system could output 60 B1 plates at 2400 DPI for higher screen rulings.

Small portrait presses that typically create 1 or 2 color output can use anything from a standard laser printer, for low quality/low volume, up to a higher-end dedicated platesetter for higher quality and volume.

Disadvantage of the CTP Plate

Restricted to digital format. CTP productions require that the basis for the printed matter as well as the imposition, be digital.

Remaking of plates. If for some reason a CTP plate is damaged, if an error occurs when it’s ripped or if something has to be corrected after the plate is exposed, a completely new, imposed plate must be created

The CTP Tech in Deprintedbox

Deprintedbox uses the latest Computer to Plate technology, saving both time and money and improving print quality.

Faster Production Cycles CTP eliminates steps from the production cycle. Even in a Computer to Film (CTF) workflow it can take five steps from having the copy in digital form to having it imaged on a plate. In a CTP process four of these steps are fully removed. Each step eliminated from the process reduces the overall time required to get plates to press, getting the job to you more quickly.

Lower Printing Costs CTP eliminates the need for film by imaging the page directly from the computer to the printing plate, which, shortens production cycles and can save on material costs ultimately saving you money.

Sharper Print Quality CTP allows printing presses to print cleaner and crisper images by way of eliminating dot gain in the prepress process. In a CTP workflow, first generation dots are imaged to the plate eliminating dot gain in prepress. This gives the press more capacity for printing higher ink densities resulting in richer, better saturated colours.

Better Registration CTP excludes the use of film negatives or positives. CTP plates are imaged on highly accurate plate setting equipment on aluminium substrates that are very resistant to changes in temperature and humidity. Even imposed computer to film workflows cannot offer the accuracy and stability of registration that a CTP system can provide.

computer to plate CTP tech iexplanation