# Kevlar - Stage 1 (technology)

internal name `kevlar` · tier 4 (pY science pack 2, [tier 4](https://factorio.kalzumeus.com/tier/4.md))
HTML page: https://factorio.kalzumeus.com/tech/kevlar/

## Cost

700 units of (1 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 2 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 3 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 6 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 90 s each.

## Requires (2)

- [Nitrobenzene](https://factorio.kalzumeus.com/tech/nitrobenzene.md)
- [Nylon](https://factorio.kalzumeus.com/tech/nylon.md)

## Leads to (1)

- [Aramid](https://factorio.kalzumeus.com/tech/aramid.md)

## Unlocks (3 recipes)

### Kevlar (`kevlar`)

- 6 s · tier 4 · productivity modules allowed
- Ingredients: 5 × [p-Phenylenediamine (PPD)](https://factorio.kalzumeus.com/item/ppd.md), 50 × [Terephthaloyl chloride (TCl)](https://factorio.kalzumeus.com/fluid/tpa.md), 100 × [Organic solvent](https://factorio.kalzumeus.com/fluid/organic-solvent.md), 5 × [Nylon](https://factorio.kalzumeus.com/item/nylon.md)
- Results: 5 × [Kevlar](https://factorio.kalzumeus.com/item/kevlar.md)
- Made in: Chemical plant, Chemical plant MK 01, Chemical plant MK 02, Chemical plant MK 03, Chemical plant MK 04
- Unlocked by: [Kevlar - Stage 1](https://factorio.kalzumeus.com/tech/kevlar.md)

### p-Phenylenediamine (PPD) (`ppd`)

- 4 s · tier 4 · productivity modules allowed
- Ingredients: 500 × [Ammonia](https://factorio.kalzumeus.com/fluid/ammonia.md), 50 × [Nitrobenzene](https://factorio.kalzumeus.com/fluid/nitrobenzene.md), 400 × [Chlorine](https://factorio.kalzumeus.com/fluid/chlorine.md)
- Results: 10 × [p-Phenylenediamine (PPD)](https://factorio.kalzumeus.com/item/ppd.md)
- Made in: Electrolyzer MK 01, Electrolyzer MK 02, Electrolyzer MK 03, Electrolyzer MK 04
- Unlocked by: [Kevlar - Stage 1](https://factorio.kalzumeus.com/tech/kevlar.md)

### Terephthaloyl chloride (TCl) (`tpa`)

- 4 s · tier 4 · productivity modules allowed
- Ingredients: 100 × [Aromatics](https://factorio.kalzumeus.com/fluid/aromatics.md), 2 × [Cobalt extract](https://factorio.kalzumeus.com/item/cobalt-extract.md), 50 × [Liquid nitrogen](https://factorio.kalzumeus.com/fluid/liquid-nitrogen.md), 1 × [Yotoi aloe fruit](https://factorio.kalzumeus.com/item/yotoi-fruit.md), 20 × [Manure bacteria](https://factorio.kalzumeus.com/fluid/manure-bacteria.md)
- Results: 50 × [Terephthaloyl chloride (TCl)](https://factorio.kalzumeus.com/fluid/tpa.md)
- Made in: Rectisol MK 01, Rectisol MK 02, Rectisol MK 03, Rectisol MK 04
- Unlocked by: [Kevlar - Stage 1](https://factorio.kalzumeus.com/tech/kevlar.md)