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Archive | UL 969

Fun fact: Was supposed to be UL 968, but the 13-year old son of UL’s CEO thought 969 would be funnier.

Three Quick Facts: UL 969 Labels

Nilpeter Printing Press

Want some UL knowledge, but don’t want to deal with my lengthy rantings? Boom…you’re welcome. There is an blog post over at that briefly touches on UL 969. It’s short, but oh so sweet. UL labels can get complicated1, but sometimes knowing a few key details can make a difference. This may not be the […]

A Tale of Two Thermals

Direct Thermal Labels

Direct thermal and thermal transfer both use heat for imaging, but only one is approved for UL 969 labels. Do you know the difference? Admittedly because they sound similar, they can be easily confused. But each process requires very different materials–there is no one material fits all approach. In addition, permanency of the image varies wildly between the […]

UL Recognized Core Labels


“Make sure you have your core labels,” says pretty much every UL Inspector ever. One of the biggest reasons UL 969 labels are rejected by a UL Inspector is the lack of core labels. But what exactly are core labels, and why are they so important? Let’s start with the why. Let me walk you through this this […]

7 Quick Tips for UL Labels

Labels on conveyor

Here are some helpful tips I’ve compiled over the years working with companies to produce their Underwriter’s Laboratories labels: (1) Do sweat the details: There’s a lot of details and jargon–but they are important. For example, did you know the difference between PGJI2 and PGJI8 compliant labels is literally a country (USA versus Canada in this case)? […]