Chemistry 23

Lore & Background

In the scattered workshop logs that players trade on forums and Discord servers, "Chemistry 23" has become a shorthand for the moment a factory stops being a jumble of individual machines and starts feeling like a living system. The name itself is a small joke: no official tech card bears that label, yet every builder who has wrestled a chemical plant into a tidy 2×4 footprint understands exactly what the number means. Chemistry 1 gives you the plant; Chemistry 2 refines what it can do; Chemistry 3 lets it churn at full speed. A "Chemistry 23" blueprint is the layout that marries all three into a single, repeatable unit. The community lore around the name is light and affectionate. Some players claim it references the 23rd revision of their personal template; others say it is simply the last two digits of a version number they never bothered to reset. What matters is the shared understanding: paste it, connect the belts, and your sulfuric acid line stops leaking logic. In a game where the factory is the character, a well-named blueprint is as close to a signature as a player gets. There is no in-game NPC, no alien archive, and no scripted event that calls a layout "Chemistry 23." The name lives entirely in the space between players—in the clipboard, in the shared .fz file, in the little comment someone types before hitting paste. It is, in the truest sense, a fan artifact: a piece of Factorio culture that the game itself never authored but every builder instantly recognises.

In Their Own Story

The night the sulfuric acid line finally held, Mara leaned back in her chair and exhaled a breath she'd been holding for forty minutes. On the monitor, the little chemical plant hummed at steady output, its input pipes a calm blue, its output a steady amber stream of acid flowing into the storage tank. She'd pasted the layout from a .fz file a friend had sent that morning—filename: *Chemistry23_v7.fz*—and for the first time the pipes didn't tangle, the belts didn't bottleneck, and the little green arrows on the conveyor actually meant something. She opened the chat channel. "Chemistry 23, v7. It works. I don't know who made it, but I owe them a coffee."

Three seconds later, a reply: "You owe me two. I spent an evening on the pipe routing."

Mara laughed, saved the layout under her own name, and queued up the next module. Outside the workshop window, the alien sky was the same pale, indifferent grey it had always been. Inside, the factory was finally, quietly, alive.

Reader's Guide

The Chemistry technology line in Factorio spans three tiers. Chemistry 1 unlocks the Chemical Plant, the core building that converts fluid inputs (crude oil, water) into intermediate products like sulfuric acid, plastic, and refined oils. Chemistry 2 expands the plant's recipe set and throughput options, and Chemistry 3 pushes the plant to its maximum production speed. Together they form the backbone of every mid-to-late-game factory. A blueprint named "Chemistry 23" is not a research entry; it is a player-saved layout. In-game, you select a region (Ctrl+B), name it, and copy it to the clipboard (Ctrl+Shift+C) or export it as a .fz file. Pasting it elsewhere reconstructs the chemical plant, its pipes, belts, and any attached inserters in one action. The name is purely cosmetic but serves as community shorthand. Notable community designs under this label typically feature a 2×4 or 3×4 chemical plant with pre-routed input and output pipes, a small buffer tank, and belt connections sized for the plant's default output rate. Because blueprints do not carry research state, a pasted "Chemistry 23" layout will only function if the player has already researched the relevant Chemistry tier. The blueprint interacts with the tech tree purely through this prerequisite: it is a spatial template, not a knowledge unlock. When sharing, the most useful practice is to include a short comment noting which Chemistry tier the layout assumes, so the recipient knows whether they need to research further before the plant will actually run.

Did You Know?

• There is no official Factorio technology called "Chemistry 23"; the name is a community-coined blueprint label referencing the three-tier Chemistry tech line.
• A single Chemical Plant can run multiple recipes simultaneously, which is why community "Chemistry 23" layouts often include a small recipe-selection note in the file comment.
• Blueprints in Factorio are stored as compressed JSON inside .fz files, meaning a "Chemistry 23" layout shared on a forum is literally a small text file any player can inspect.
• The Chemistry tech line sits in the red-science tier, placing it firmly in the mid-game progression before the player transitions to blue and green science research.