The abc’s of successful creasing
One of Invercote’s many strengths is how well it works for creasing. But apart from choosing the right paperboard, how can you achieve a perfect result in your project?
THIS CONTENT IS ALSO AVAILABLE IN INSPIRE 57 2017
An annual report, a luxury carton or an attractive cover of a magazine (like Inspire 57). What these three objects have in common is that they must all be designed, printed and then folded. But how do you get that perfect fold that promotes your design instead of disrupting it? The answer is creasing and this is why:
1. For the perfect fold
Unlike paper, paperboard should always be creased before it is folded. The reason is to get well-defined lines that facilitate the folding process and enable the product to retain its intended form and function. The concrete advantage of creasing is that it eliminates the occurrence of things like worn spines and ugly cracks that would otherwise spread across the paperboard surface. In brief, creasing is perfect for products that are opened and closed often but that must still keep their colour and form over time.
2. Doesn’t disrupt the design
For design-conscious individuals and designers of creative printed materials and innovative, high-quality packaging, creasing is the foundation of a perfect end result. You never need to worry that the crease will wear the print, varnish or other finishing. Look at the cover of Inspire 57 and you will see how the title continues on the back without any wear occurring at the spine.
3. Some technical stuff
So how is it done? In most cases, to make a crease, a thin steel strip with a round and smooth edge is pressed into the paperboard. This creates an indentation in the fibres that gives a precise crease. The breadth and depth of the crease are determined by the combination of the creasing tool and the paperboard’s properties. The deeper and narrower the crease is, the better the end result. That is why thicker paperboard may have to be creased more than once for a good result.
4. The art of choosing paperboard
Your choice of paperboard is therefore important for a good outcome. Different paperboards have different qualities and properties that determine their creasability. The key criterion is the paperboard’s ability to form a deep and narrow crease. The paperboard must also be able to adapt to the shape of the creasing tool and not be sensitive to minor variations that can occur, for instance in converting machines.
In conclusion, when choosing a paperboard you need to consider both how suitable it is for creasing and how well it lives up to other properties such as stiffness and tear strength. All to get that desired perfect result.
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