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The amount of ink used in label printing is typically determined by the size of the graphic area, which is defined by the customer. As a result, the printing company has limited flexibility to adjust the ink volume. This is why it's important to adopt a "nail" spirit—being meticulous and cost-conscious—to optimize resources without compromising quality.
1. Pay attention to the difference between two-layer and single-layer ink printing
In large-area printing, most label printers use two layers of ink to prevent issues like ink smudging. However, there’s another benefit: when the color density is the same, using two thin layers of ink can actually save on ink consumption compared to one thick layer. Here’s an example to illustrate this:
A job required a 500-line/inch, 4.0 BCM anilox roll to print Kodak red. To reduce ink smudging on foamed PS material, a two-layer printing method was applied. The first layer used a 1000-line/inch, 1.5 BCM anilox roll, while the second layer used an 800-line/inch, 2.2 BCM anilox roll. Visually, the results were nearly identical, and instrument measurements confirmed they met quality standards. However, when using a single thick ink layer, the ink’s flatness may be poor, leading to blooming or a lighter appearance. On coated paper, ink penetration can worsen this issue. By using two layers, the first thin layer helps fill surface irregularities, and the second layer provides a smoother finish with higher measured density.
2. Decide whether glazing is necessary
Glazing serves two main purposes: enhancing gloss and protecting the label from wear. If the goal is just to increase shine, flexo inks often have enough brightness on their own, making glazing unnecessary. However, if protection is needed, not all labels require glazing. For example, if a label won’t be exposed to friction during transport or use, glazing might be redundant. Many companies apply glazing out of habit rather than necessity, which can lead to unnecessary costs.
Although varnish is cheaper than regular inks, it’s often applied in full-coverage coats, which can result in overuse and waste. It’s important to evaluate the actual needs before deciding on glazing. For instance, if the label will be placed in a non-friction area, ultra-transparent labels might not need glazing. For special-shaped labels that require large die-cutting areas, partial glazing could be sufficient. When glazing is needed, the thickness should be adjusted to meet customer requirements. For labels requiring wear resistance, sufficient varnish thickness and even anti-wear additives may be necessary. In short, the key is to meet customer needs without adding unnecessary processes that waste resources or increase costs unnecessarily.
　　 The above content is taken from the first issue of 2012, Label Printing Technology. For more articles, please visit the journal channel.
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Art Brush is a type of painting Brush , it is widely used for Painting like Oil Painting Brush, Acrylic Painting Brush, Watercolor Painting Brush. There are art Brush for artists and students. Currently there are lots of brands in the market. It has different shapes like FLAT, Oval, Filbert, Round, Lines Brush.
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