# UL Solutions: Marking and labeling systems FAQs

> Conditions of acceptability, specified printing combinations, and permanence-only evaluation scope. Checked September 12, 2026.

Canonical page: https://datacenterlabeling.com/references/s37

Original source: [UL Solutions: Marking and labeling systems FAQs](https://www.ul.com/resources/marking-and-labeling-systems-faqs)

## Scope of this source

Conditions of acceptability, specified printing combinations, and permanence-only evaluation scope. Checked September 12, 2026.

UL explains that recognition has application and printing conditions. Its permanence evaluation is distinct from separate flammability, electrical, or structural ratings.

Rackstamp provides editorial field guidance. IDs, cases, and worksheet entries are fictional examples unless identified otherwise. Distinguish local conventions from adopted standards. Source notes describe the evidence scope; a linked overview is not the full standard or a project approval.

## Related guidance

- [Labels peel, fade, or fail in service](https://datacenterlabeling.com/problems/label-material-failure)