🆕 Updated for Eco 14 — “Garbage & Recycling” — this server and these numbers now reflect the new version. What changed →
  • Byproducts: nearly every recipe now leaves waste behind, so recipe pages list byproducts alongside ingredients.
  • Garbage & recycling: waste sorts from mixed garbage down to pure materials, and can be recycled back into stock.
  • Pollution has four kinds: acid rain, chemical, soil and heavy mineral, each settling into the ground differently. Pollution guide →
  • Modules reworked: upgrades are now Basic / Advanced / Modern / Specialty, one per slot, driving the same bonus system as talents. Module guide →
  • Fresh water: machines need it — water drawn from the ocean has to be desalinated first.

The character calculator has been updated for these changes. Read the garbage & recycling guide →

Composites Skill Book

Composites Skill Book

Hidden/Research
Weight1000 gMax stack1SkillCarpentry Lv 1StationLaboratory

Notes

The Composites Skill Book is a research item that unlocks the Composites specialty, a high-tier skill tree for advanced materials. It is crafted at a Research Table and can produce unlimited skill scrolls for other players, making it essential for late-stage technology like reinforced concrete and composite blocks. Because it costs 4 or more stars to learn (per the standard tiered pricing) and triggers the escalating specialty cost penalty, a town should coordinate on who researches it rather than having multiple players waste resources crafting duplicate books.

Notes are AI-generated and may be imprecise.

⚙ Craft calculator — adjust for your modules, skill & talents
Upgrade modules (one per slot)
Talents

Ingredients

Byproducts (garbage)

Garbage byproducts of this recipe
MaterialQty / craft
Bio Residue≈ 1.44
Garbage≈ 0.72

Approximate โ€” a category ingredient's salvage value depends on the item actually used.

Crafting waste collects in the station's garbage output and must be hauled away or recycled โ€” see the Garbage & Recycling guide.

Crafting

Crafting stats
Labor6000 calories
Craft time30 min
Throughput≈ 2 Composites Skill Book / hour (base)

Total raw to craft this

Steps134Total labor259738 calTotal time4136.48 min

Approximate โ€” category ingredients and any production cycles are counted as raw.

Categories

Obtained from

See also

Within these pressed pages lies the secret of binding diverse substances into something stronger than their sum.