# Buffer

*Also called: screening machine*

**A single-disc rotary machine, typically 400–500 mm, fitted with fine screens around 100–150 grit — it removes microns, not wood.**

It does two jobs: final screening before the first coat of finish, and intercoat abrasion between successive coats. Both exist to create a uniform microscopic scratch pattern so the next layer bonds properly.

It does not correct bad sanding. It only prepares a correctly sanded floor.

## Related terms

- [Intercoat screening](https://ecowoods.ca/glossary/intercoat-screening)
- [Planetary sander](https://ecowoods.ca/glossary/planetary-sander)
- [Belt floor sander](https://ecowoods.ca/glossary/belt-sander)


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## Provenance

- Canonical URL: https://ecowoods.ca/glossary/buffer
- Publisher: Ecowoods Inc., Toronto & the GTA
- Contact: (647) 244-5156 · services@ecowoods.ca
- Defined in: https://ecowoods.ca/papers/hardwood-refinishing-machines-and-sequence#buffer
- Citation guide: https://ecowoods.ca/ai.txt

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