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)? That can be the different between getting the all-clear from an inspector and having product held up.

(2) There are actually two–very distinct–main categories of UL Labels: One is for printing UL Marks and involves at least one of UL’s logos (i.e. UL Listed, UL Classified, etc). The other is for UL 969 labels and is best thought of as durability standard for safety labels and markings. Understanding which category you need can help focus your project and reduce the confusion.

(3) Authorized is important: If you are printing a UL logo, you need to use a UL authorized printer (with a PGAA file). UL randomly audits these authorized printers as many as 4 times a year (crazy right?), to make sure their product and procedures are in compliance.

(4) Know your type: When printing UL logos, there are two different types (think of them as subcategories). They are known as Type-L and Type-R. The easiest way to tell them apart? Type-L have issue or serial numbers, while Type-R have control numbers.

(5) The surface matters: When dealing with UL Recognized Components Labels, the application surface matters. Not only for what type of adhesive you should use, but the temperature suitability of the material. For example, it’s not uncommon for UL to rate a face stock for 300 degrees on one material, and 180 degrees on another.

(6) Don’t forget the core label: I have come to the rescue of many a frantic company who had product held up because their old labels weren’t properly marked. UL 969 compliant labels require a special core label. This informs the UL inspector of the exact composition of the labels, and confirms its compliance. No core label and you are taking your chances.

(7) Don’t worry, it’s not just you: UL actually makes it that confusing sometimes. When in doubt, take a deep breath!