Simple vs Composite Reactions Explained

Reactions in EVE Online come in different complexity levels, and understanding the difference between Simple Reactions and Composite Reactions is essential if you want to move from basic industry into profitable large-scale production.

These two reaction types sit at the core of the moon and gas industry ecosystem, and they determine how raw materials are transformed into the advanced components used in Tech II manufacturing, structures, and capital production chains.

What Are Reactions (Quick Context)

Reactions are industrial processes that:

Convert raw moon materials or gases into refined intermediate products.

They are run in Refineries or industrial structures and are a key bridge between resource extraction and advanced manufacturing.

Simple Reactions Explained

Simple reactions are the most basic form of reaction processing.

They involve:

One type of input material being converted into one output product

How Simple Reactions Work

You load a single raw material into a refinery
A reaction blueprint processes it
You receive a refined intermediate product

Example of a Simple Reaction

Raw input: Moon ore material
Output: Refined moon product

Example chain:

Atmospheric Gases → Carbon Polymers
Evaporite Deposits → Silicon Diborite
Hydrocarbons → Plastics

Key Characteristics

1. One-to-One Processing

Single input type
Single output product

2. Lower Complexity

Easier logistics
Fewer materials to manage

3. Stable Production Chains

Predictable input requirements
Easier to scale across multiple reactors

4. Entry-Level Reaction Type

Ideal for beginners in reaction industry
Often first step into moon industry

Advantages of Simple Reactions

Easy to understand and manage
Low logistical overhead
Consistent output
Good for learning reaction mechanics

Disadvantages of Simple Reactions

Lower value outputs compared to composite reactions
Limited flexibility
Often part of larger chains rather than final products

Composite Reactions Explained

Composite reactions are more advanced industrial processes.

They involve:

Multiple input materials being combined into a single higher-value output

How Composite Reactions Work

You supply two or more different input materials
The refinery processes them together
A more advanced product is created

Example of a Composite Reaction

Inputs:

Material A (moon-derived)
Material B (moon-derived or gas-derived)

Output:

Advanced polymer or Tech II component material

Example chain:

Carbon Polymers + Silicon Diborite → Advanced Composite Material
Hydrocarbons + Evaporite Products → Structural Materials

Key Characteristics

1. Multi-Input Processing

Requires multiple supply streams
More complex logistics

2. Higher Value Outputs

Used in advanced manufacturing chains
Higher ISK per reaction cycle potential

3. Dependency on Supply Chains

Requires coordinated sourcing of materials
Often tied to multiple mining operations

4. Mid-to-Advanced Industry Tier

Not beginner-friendly without logistics support
Common in corporation-level industry

Advantages of Composite Reactions

Higher profit potential per cycle
Essential for Tech II and capital production chains
Better ISK efficiency when optimised
Enables advanced industrial scaling

Disadvantages of Composite Reactions

Complex logistics and supply chains
Higher risk of input shortages
More difficult to balance profitability
Requires careful market monitoring

Simple vs Composite: Key Differences

Feature	Simple Reactions	Composite Reactions
Inputs	1 material	2+ materials
Output	Basic refined product	Advanced material
Complexity	Low	Medium–High
Logistics	Easy	Complex
Profit potential	Moderate	High
Skill requirement	Lower	Higher
Industry role	Entry-level processing	Advanced production chains

Where They Fit in Industry

Both reaction types sit between mining and manufacturing:

Simple Reaction Role:

Raw materials → Basic refinement

First step in moon and gas processing
Produces foundational industrial materials

Composite Reaction Role:

Refined materials → Advanced components

Feeds Tech II production chains
Enables high-end manufacturing

When to Use Simple Reactions

Simple reactions are best when:

You are new to reaction industry
You want low-maintenance production
You are building foundational stockpiles
You are scaling multiple reaction planets or structures

When to Use Composite Reactions

Composite reactions are best when:

You have stable supply chains
You operate in a corporation or alliance industry setup
You are producing Tech II or capital components
You want higher ISK efficiency per structure

Common Beginner Mistakes

1. Jumping straight into composite reactions

Without supply chains, this leads to material shortages.

2. Underestimating logistics complexity

Composite reactions require reliable input flow.

3. Ignoring market demand

Not all advanced materials sell consistently.

4. Overbuilding reaction infrastructure

Unused reactors tie up ISK and fuel.

How They Connect in Industry Chains

A typical progression looks like this:

Step 1 – Mining / Gas harvesting

Raw resources collected

↓

Step 2 – Simple Reactions

Basic refinement of materials

↓

Step 3 – Composite Reactions

Advanced material creation

↓

Step 4 – Manufacturing

Tech II / capital production

↓

Step 5 – Market

Final sale or corp usage

Final Summary

Simple and composite reactions represent two key stages in EVE Online’s industrial processing system. Simple reactions focus on single-input refinement and provide an accessible entry point into reaction industry, while composite reactions combine multiple inputs to produce higher-value materials used in advanced manufacturing chains.

Simple reactions are ideal for beginners or low-maintenance setups, while composite reactions are suited for experienced industrialists managing complex supply chains and aiming for higher profit margins.

In essence, simple reactions build the foundation of industry, while composite reactions drive its high-value output economy.