# Etching solution

Pyanodons fluid · internal name `etching` · first craftable in tier 4 (pY science pack 2, [tier 4](https://factorio.kalzumeus.com/tier/4.md))
HTML page: https://factorio.kalzumeus.com/fluid/etching/

## Produced by (1 recipes)

### Etching solution (`etching`)

- 10 s · tier 4 · productivity modules allowed
- Ingredients: 100 × [Phosphoric acid](https://factorio.kalzumeus.com/fluid/phosphoric-acid.md), 100 × [Sulfuric acid](https://factorio.kalzumeus.com/fluid/sulfuric-acid.md), 50 × [Hydrogen peroxide](https://factorio.kalzumeus.com/fluid/hydrogen-peroxide.md), 10 × [Lard](https://factorio.kalzumeus.com/item/mukmoux-fat.md)
- Results: 150 × [Etching solution](https://factorio.kalzumeus.com/fluid/etching.md)
- Made in: Chemical plant, Chemical plant MK 01, Chemical plant MK 02, Chemical plant MK 03, Chemical plant MK 04
- Unlocked by: [Semiconductor doping](https://factorio.kalzumeus.com/tech/semiconductor-doping.md)

## Used in (16 recipes)

- Heavily n-doped silicon (`heavy-n`, tier 4) → [Heavily n-doped silicon](https://factorio.kalzumeus.com/item/heavy-n.md)
- Lightly n-doped silicon (`light-n`, tier 4) → [Lightly n-doped silicon](https://factorio.kalzumeus.com/item/light-n.md)
- Lightly p-doped silicon (`p-dope`, tier 4) → [Lightly p-doped silicon](https://factorio.kalzumeus.com/item/p-dope.md)
- Printed circuit substrate (tier 2) (`pcb2`, tier 4) → [Printed circuit substrate (tier 2)](https://factorio.kalzumeus.com/item/pcb2.md)
- PDMS graphene base (`pdms-graphene`, tier 5) → [PDMS graphene base](https://factorio.kalzumeus.com/item/pdms-graphene.md)
- Solar panel MK 01 (`solar-panel-mk01`, tier 5) → [Solar panel MK 01](https://factorio.kalzumeus.com/item/solar-panel-mk01.md)
- Heavily p-doped silicon (`heavy-p-type`, tier 6) → [Heavily p-doped silicon](https://factorio.kalzumeus.com/item/heavy-p-type.md)
- Lightly p-doped silicon (`p-dope2`, tier 6) → [Lightly p-doped silicon](https://factorio.kalzumeus.com/item/p-dope.md)
- Lightly n-doped silicon (`light-n2`, tier 7) → [Lightly n-doped silicon](https://factorio.kalzumeus.com/item/light-n.md)
- Nanoelectromechanical systems (`nems`, tier 7) → [Nanoelectromechanical systems](https://factorio.kalzumeus.com/item/nems.md)
- Printed circuit substrate (tier 4) (`pcb4`, tier 7) → [Printed circuit substrate (tier 4)](https://factorio.kalzumeus.com/item/pcb4.md)
- Quantum dots (`quantum-dots`, tier 7) → [Quantum dots](https://factorio.kalzumeus.com/item/quantum-dots.md)
- Solar panel MK 02 (`solar-panel-mk02`, tier 7) → [Solar panel MK 02](https://factorio.kalzumeus.com/item/solar-panel-mk02.md)
- Nutrient AI systems (`nutrient`, tier ?) → [Nutrient AI systems](https://factorio.kalzumeus.com/item/nutrient.md)
- Sawblade MK 03 (`py-sawblade-module-mk03`, tier ?) → [Sawblade MK 03](https://factorio.kalzumeus.com/item/py-sawblade-module-mk03.md)
- Sawblade MK 04 (`py-sawblade-module-mk04`, tier ?) → [Sawblade MK 04](https://factorio.kalzumeus.com/item/py-sawblade-module-mk04.md)