# CryoBranding (DD-006)

> Some horses are branded with -196 °C cold instead of fire, and the hair grows back snow-white in the brand's shape.

- Department: Nature
- First published: 2026-08-31
- Last updated: 2026-10-17
- Permalink: https://detailenjoyer.com/case/cryobranding/
- Author: Marcus Easterling (DetailEnjoyer), The Detail Department

## On the timeline

- **1966**: Freeze branding is invented by WSU veterinarian R. Keith Farrell

Full timeline: https://detailenjoyer.com/timeline/?case=cryobranding

## Quick facts

- **DD-006-F01**: Freeze branding marks horses with extreme cold instead of fire, and the hair grows back white in the brand's shape. _(Slide 01 · Cover)_
- **DD-006-F02**: Freeze-branding irons are copper or brass and are chilled in liquid nitrogen (-196 °C / -320 °F) or a dry ice and alcohol bath. _(Slide 02 · Exhibit A)_
- **DD-006-F03**: Freeze branding destroys the hair's pigment cells (melanocytes) but spares the growth follicle, so the hair grows back white. _(Slide 03 · Exhibit B)_
- **DD-006-F04**: A copper freeze-branding iron is typically held on a dark horse for 7 to 10 seconds, while cows need 25 to 30 seconds. _(Slide 04 · Exhibit C)_
- **DD-006-F05**: Holding a freeze-branding iron on a horse for 12 or more seconds stops the hair from growing, leaving a bald mark that shows up on light coats. _(Slide 05 · Exhibit D)_
- **DD-006-F06**: The new white hair from a freeze brand takes 2 to 3 months to grow in. _(Slide 06 · Exhibit E)_
- **DD-006-F07**: Freeze branding was invented in 1966 by Washington State University veterinarian R. Keith Farrell as a gentler alternative to hot irons. _(Slide 07 · Exhibit F)_
- **DD-006-F08**: In a 300-steer study, hot-iron-branded cattle kicked, fell and bellowed more than freeze-branded cattle. _(Slide 08 · Exhibit G)_
- **DD-006-F09**: Human skin is far thinner than horse or cow hide; one woman's 10-second freeze brand caused a deep burn that needed 6 months of wound care. _(Slide 09 · Exhibit H)_

## Write-up

Farmers brand horses with freezing cold, not fire. And the hair grows back white.

1. **Liquid nitrogen: -196 °C**: Copper or brass irons are chilled in liquid nitrogen (-320 °F) or a dry ice and alcohol bath.
2. **It kills only the color**: The cold destroys pigment cells (melanocytes) but spares the growth follicle, so the hair grows back white.
3. **7 to 10 seconds**: Typical copper-iron time on a dark horse. Cows need 25 to 30 seconds.
4. **Bald on purpose**: Hold it longer (12+ seconds on a horse) and the hair stops growing. That bald mark shows up on light coats.
5. **2 to 3 months**: That's how long the new white hair takes to grow in.
6. **Invented in 1966**: By Washington State University veterinarian R. Keith Farrell, as a gentler alternative to hot irons.
7. **Gentler than fire**: In a 300-steer study, hot-iron cattle kicked, fell and bellowed more than freeze-branded ones.
8. **Not for humans**: Our skin is far thinner. A 10-second freeze brand gave one woman a deep burn that needed 6 months of wound care.

## Related case files

- [Winter in Harbin (DD-034)](https://detailenjoyer.com/case/winter-in-harbin/): Extreme cold put to work.
- [Dipping Dipper (DD-040)](https://detailenjoyer.com/case/dipping-dipper/): Cold water and animals.
- [Death Foam (DD-043)](https://detailenjoyer.com/case/death-foam/): Another farm-animal practice up close.
- [Hungarian Herding Dogs (DD-691)](https://detailenjoyer.com/case/hungarian-herding-dogs/): Another case from the world of livestock work

## Video: Freeze Branding Explained: Marking Horses and Cattle With Extreme Cold

- Duration: 29 s · Published: 2026-08-31
- File: https://detailenjoyer.com/assets/videos/Dcsxl2YRU4r.mp4

### Transcript

Did you know? Freeze branding, or cryogenic branding, uses extreme cold rather than heat to create a permanent identification mark, most commonly on cattle and horses. A copper or bronze branding iron is chilled with liquid nitrogen or dry ice and alcohol, then briefly pressed against the animal's clipped skin. Freeze branding has also crossed over from livestock identification into a niche body modification trend, with social media videos showing people deliberately using cryogenically cooled metal to create permanent marks on their skin.

## Questions & answers

**Q: Freeze-branding irons are chilled in liquid nitrogen. How cold is it?**  
A: Liquid nitrogen is -196 °C (-320 °F). _(Source: Slide 02 · Exhibit A (Liquid nitrogen: -196 °C))_

**Q: Why does freeze-branded hair grow back white?**  
A: The cold destroys the pigment cells (melanocytes) but spares the follicle, so the hair grows back colorless. _(Source: Slide 03 · Exhibit B (It kills only the color))_

**Q: How long is a copper iron typically held on a dark horse?**  
A: It's 7 to 10 seconds on a dark horse. Cows need 25 to 30. _(Source: Slide 04 · Exhibit C (7 to 10 seconds))_

**Q: How long does the new white hair take to grow in?**  
A: The white hair takes about 2 to 3 months to grow in. _(Source: Slide 06 · Exhibit E (2 to 3 months))_

**Q: Who developed freeze branding, and when?**  
A: R. Keith Farrell of WSU developed it in 1966 as a gentler alternative to hot irons. _(Source: Slide 07 · Exhibit F (Invented in 1966))_

## Sources

- [MSU Extension: Freeze Branding Techniques for Horse Owners](https://extension.msstate.edu/publications/freeze-branding-techniques-for-horse-owners)
- [MSU Extension: Freeze Branding Beef Cattle](https://extension.msstate.edu/publications/freeze-branding-beef-cattle)
- [UGA CAES (C904): Freeze Branding Cattle](https://fieldreport.caes.uga.edu/publications/C904/freeze-branding-cattle/)
- [University of Saskatchewan: Livestock branding guide](https://library.usask.ca/gp/sk/da/livestock/branding/DOCS/livestock/beef/production_information/branding1277.html)
- [Freeze Branding Horses (WSU repository)](https://hdl.handle.net/20.500.14446/340372)
- [WSU Timeline: A Better Brand](https://timeline.wsu.edu/timeline/a-better-brand/)
- [WSU Extension: Freeze brand seminar (May 1966)](https://rex.libraries.wsu.edu/esploro/outputs/report/Freeze-brand-seminar/99900502689401842)
- [Farrell et al. 1966 (PubMed 6008246)](https://pubmed.ncbi.nlm.nih.gov/6008246)
- [US Patent 3,362,381](https://patents.google.com/patent/US3362381A/en)
- [Schwartzkopf-Genswein et al. 1997, J Anim Sci (300-steer study)](https://pubmed.ncbi.nlm.nih.gov/9263052/)
- [Schwartzkopf-Genswein et al. 1997, Can J Anim Sci (cortisol study)](https://cdnsciencepub.com/doi/10.4141/A96-127)
- [Mitchell et al. 2021, Int J Burns Trauma (PMC8166665)](https://pmc.ncbi.nlm.nih.gov/articles/PMC8166665/)
- [Mitchell et al. 2021, Int J Burns Trauma (PDF)](https://e-century.us/files/ijbt/11/2/ijbt0131572.pdf)
- [The Conversation (2025): Freeze branding, the new body modification technique, causes serious and irreversible harm](https://theconversation.com/freeze-branding-the-new-body-modification-technique-causes-serious-and-irreversible-harm-255786)
- [USDA ARS: Liquid Nitrogen Safety](https://www.ars.usda.gov/northeast-area/docs/safety-health-and-environmental-training/liquid-nitrogen-safety/)
- [University of Hawaii EHSO: Liquid Nitrogen Safety Guidelines (PDF)](http://www.hawaii.edu/ehso/wp-content/uploads/2016/07/Liquid-Nitrogen-Safety-Guidelines.pdf)
- [University of Tennessee EHS: Cryogens (PDF)](https://ehs.utk.edu/wp-content/uploads/2025/08/Cryogens_2023.pdf)
- [Journal of Burn Care & Research (2023), doi:10.1093/jbcr/irad110](https://doi.org/10.1093/jbcr/irad110)

## Cite this case file

Easterling, Marcus. "CryoBranding." The Detail Department (DetailEnjoyer), case file DD-006, last updated Oct 17, 2026. https://detailenjoyer.com/case/cryobranding/