The etchings or inscriptions found in the runout groove area of a vinyl record often contain additional information beyond what’s printed on the label or sleeve. These etchings are sometimes referred to as “dead wax” or “dead groove.” Here are some common types of etchings and what they may signify:
- Matrix or Runout Numbers: The most common etchings are the matrix or runout numbers. These alphanumeric codes uniquely identify the master used for pressing the record, the pressing plant, and sometimes additional information like the side of the record and the cutting engineer. They are essential for identifying specific pressings and mastering sources.
- Catalog Numbers or Abbreviations: Sometimes, record labels or pressing plants may include abbreviated catalog numbers, pressing plant codes, or other identifying marks in the etchings.
- Personal Messages: Occasionally, artists, engineers, or pressing plant workers may etch personal messages, signatures, or doodles into the dead wax. These can be interesting Easter eggs for collectors but are relatively rare.
- Cutting or Mastering Information: Some etchings may include details about the cutting or mastering process, such as the initials or name of the mastering engineer, mastering studio, or cutting equipment used.
- Date Codes: In some cases, date codes or date stamps may be etched into the dead wax, indicating when the record was mastered or pressed.
- Pressing Plant Information: Etchings might include the name or location of the pressing plant where the record was manufactured.
- Promotional Markings: For promotional or special editions, there may be etchings indicating such status, like “promo,” “white label,” or other promotional markings.
These etchings are often small and may require careful examination under good lighting or with a magnifying glass to decipher. They add an extra layer of detail and intrigue to vinyl records and can be of interest to collectors, enthusiasts, and historians looking to understand more about the production and history of a particular pressing.
