Type L. Type R. What do they mean? The two types distinguish what approval path you need to follow for labels containing the UL mark. So they are important. But what the heck do those names actually mean? Well, in the end it all comes down to money. Specifically how UL wants to charge you for their […]
Archive | Terminology
Similar to a dictionary for UL Terms, except it has articles. So actually more like an encyclopedia for UL Terms.
A Tale of Two Thermals
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 […]
NRTLs rhymes with Turtles
Who or what are NRTLs and why should we care? Well the Nationally Recognized Testing Laboratory (NRTL)1 Program is a managed by the Occupational Safety & Health Administration (OSHA)2. OSHA was created in 1970 by Congress with the mission of overseeing working conditions and training in the United States. The majority of OSHA’s regulations fall into the category of general […]
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 […]
What Does S24 mean?
Let’s face it, UL standards and documents aren’t exactly easy reading material. More often than not they seem to add confusion than produce clarity. One such such subject where we see this is a lot has to do with what I like to call the “S” designations. Customers bump up against references to S24 this or S48 […]