Cork Tech Talk Blog

The use of aqueous coatings by the printing industry is, without doubt, a success story that now sees many millions of pounds of coating used annually to protect and enhance the printed material.

This success has not always come easy, as the processes of printing involves many variables which must be in control in order to produce the desired, saleable result.

These variables are inherent to the printing and coating processes themselves, and encompass such things as color shift, substrate, inks (pigments), coating, fountain solution, ink coverage, speed, drying, handling, shipping, and last but not least, the effects of the environment.

Read more: Color Shift & Aqueous Coatings

Viscosity is a measure of a fluid’s resistance to flow. It describes the internal friction of a moving fluid due to its molecular makeup. A high viscosity (thick) fluid resists motion because of high internal friction, while a low viscosity (thin) fluid flows readily because of low internal friction.

Viscosity is measured because it is important to the successful application of coatings. Viscosity has a direct relationship to the amount of coating applied by coating equipment. Coatings are formulated to be applied at a particular viscosity in order to optimize final properties.

Read more: Why and How Viscosity is Measured

Superior folding cartons begin with the proper choice of substrate, paperboard with the performance and graphics quality to successfully market the packaged product. The wide variety of substrates available to the folding carton producer, make it easy to make the wrong choice.

Converters must carefully assess printability, packaged product protection, package design requirements, processability, and package value to appreciate the tradeoffs.

Folding cartons represent a form of paperboard packaging that is constructed from 10 to 36-point (thick) board. These board types consist of a wide range of virgin and/or recycled grades (SBS, FBB, SUS, CUK, CRB, UKB, etc.). These grades possess varying characteristics that make each right for specific packaging requirements.

Read more: Folding Carton Paperboard Choices

UV Ink as a component of the global printing ink market has been forecast to grow at a 15.7% CAGR between 2015-2020 to reach $3.5 billion in 2020. Currently the global market for UV coatings has a value of $3,430. million with a future forecast projecting sustained growth of 6.1% CAGR by 2026 or $ 6,187 million.
Figures courtesy Allied Research Markets & Future Markets Insights

upchartNew opportunities for growth continue to be identified, while there is increasing penetration of known and new markets with ever expanding new applications. There is now a greater than 40-year period of sustained growth.

Read more: UV Growth Continues Unabated

More and more printers and converters are responding to requests for paper and paperboard coatings that can replace petroleum based extrusion coated polyethylene (PE) or Poly Replacement. Alternative barrier coating products that are safe for the environment are in favor due to brand marketers, legislative, political and consumer pressure.

Read more: Poly (PE) Replacement Barrier Coatings and Test Methods
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About the Author

Elmer W. Griese Jr, having accumulated 35+ years of knowledge working in the coatings and printing ink industries has now authored the Cork Tech Talk News, newsletter since 1992 producing 112 issues. He remains dedicated to educating and illuminating technological progress that offers the potential to advance coating technology and its applications.

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