These are the Blog Days of Summer. Tips to Keep Your Direct Mail Safe in the Summer Months. - Midwest Direct

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September 4, 2014

These are the Blog Days of Summer. Tips to Keep Your Direct Mail Safe in the Summer Months.

It is summer, when the days are longer and the temperature higher, so it’s time to take a few precautions to ensure that your direct mail doesn’t get damaged.

Time for a short science refreshed: Paper absorbs and gives off moisture until the moisture in the paper and the moisture in the atmosphere are in equilibrium. That means if is a humid day, your paper stock contains more moisture than if the humidity were low.

This is especially important for digital printing, as paper designed for laser and digital presses contain around 4.5% moisture. Too much humidity or moisture in the paper can result in less-than-optimal toner adhesion or a blotchy finish. Too low a moisture content can result in misfeeds due to static build up or toner scatter.

High humidity can also cause paper to curl. This includes pre-printing paper and post-printed paper. Too much moisture and curl can cause feeding problems, while too much moisture post-pint can cause issues on finishing machines, like inserters and sorters.

Higher moisture levels will also cause envelope flaps to curl and flap glue to stick to the envelope prematurely.

Tips to minimize issues:

  • + Keep paper materials in a humidity controlled location in your facility.
  • + Ream covers are designed to control moisture absorption. If you open one, keep it covered.
  • + Do not store paper in a printer tray. 80% moisture rates can exist in a printer tray.
  • + Do not leave paper stock on delivery vehicles. Once a shipment arrives, store it immediately.

 

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