# registry mark

> mark placed on a printing plate or mechanical with overlays to ensure accurate orthogonality proportionality and alignment of boards and masks, or to control ink levels, especially in the case of polychrome printing

**Wikidata**: [Q25397915](https://www.wikidata.org/wiki/Q25397915)  
**Source**: https://4ort.xyz/entity/registry-mark


## References

1. Art & Architecture Thesaurus