# Hash

> Hash is any concentrate made by separating trichome heads from cannabis and collecting or pressing them, from dry sift and ice water hash to hand-rubbed charas.

- Canonical: https://genetixbay.com/knowledge/glossary/hash.html
- Also written: hash concentrate, trichome concentrate, resin concentrate, hasj, hashes
- Glossary category: Processing · Evidence: Established
- Status: Draft: awaiting expert review · Updated: 2026-10-31
- Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay cannabis glossary"

Hash is the modern grower's catch-all term for concentrated cannabis resin obtained by physically separating [trichome heads](https://genetixbay.com/knowledge/glossary/trichome-heads.md): by dry sieving, by agitation in ice water, or by hand-rubbing live plants. The collected resin may be used loose, pressed into a solid, or processed further (pressed into rosin, for example). It is a solventless product unless stated otherwise.

## In practice

Growers describe hash by method and quality: [dry sift](https://genetixbay.com/knowledge/glossary/kief.md), [ice water hash](https://genetixbay.com/knowledge/glossary/bubble-hash.md) (bubble), full melt, [temple balls](https://genetixbay.com/knowledge/glossary/temple-ball.md), pressed hash. Quality depends on the starting material, how cleanly the heads were separated, and how the hash was cured and stored. Colour runs from pale blond to dark brown; darkness can come from plant matter, oxidation, pressing or heat, so colour alone is a poor guide. GenetixBay defines hash types but doesn't give processing instructions.

## Don't confuse with

- **Hashish**: the traditional pressed resin of historic hash-making regions; often used interchangeably.
- **Solvent extracts**: shatter, wax and [live resin](https://genetixbay.com/knowledge/glossary/live-resin.md) use solvents and are not hash.
- **Kief**: loose heads, unpressed.

## Myth check

House position: [traditional hash](https://genetixbay.com/knowledge/glossary/hashish.md) and [charas](https://genetixbay.com/knowledge/glossary/charas.md) cultures would have been impossible with weak plants; "old weed was weak" is wrong about the genetics. See [old cannabis was not weak](https://genetixbay.com/knowledge/genetics-history/old-cannabis-was-not-weak.md).

## Related terms

[Hashish](https://genetixbay.com/knowledge/glossary/hashish.md), [Kief](https://genetixbay.com/knowledge/glossary/kief.md), [Bubble hash](https://genetixbay.com/knowledge/glossary/bubble-hash.md), [Charas](https://genetixbay.com/knowledge/glossary/charas.md), [Pressed hash](https://genetixbay.com/knowledge/glossary/pressed-hash.md), [Solventless](https://genetixbay.com/knowledge/glossary/solventless.md)

## Read more

- [Old cannabis wasn't weak: the "so much stronger than 20 years ago" myth](https://genetixbay.com/knowledge/genetics-history/old-cannabis-was-not-weak.md)

## Sources

1. Clarke RC. 1998. Hashish! Red Eye Press, Los Angeles (updated edition 2010).
2. Chouvy P-A, Afsahi K. 2014. Hashish revival in Morocco. International Journal of Drug Policy 25(3):416-423. https://doi.org/10.1016/j.drugpo.2014.01.001