# Nebula®
Nebula is an **automatic machine** for the disinfection of books, documents and paper materials, designed to **eliminate microbiological agents** after dusting. Through a **controlled misting and drying process**, it allows external surfaces to be treated evenly and safely, whilst protecting both the materials and the operators.
[Discover Nebula](#features)[Watch Video](#video)
## Features of Nebula®
A disinfectant solution based on quaternary salts in distilled water is applied via controlled atomisation, ensuring even distribution across external surfaces.
The material is then dried using a calibrated air flow, which allows the treatment to evaporate completely without leaving any harmful residues.
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## Disinfection Process
The item or document is placed inside the system to start the cycle.
The quaternary salt-based disinfectant is sprayed evenly onto the external surfaces.
A controlled air flow ensures rapid and thorough drying.
The number of passes can be set to adapt the treatment to the condition of the materials.
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## Key benefits of Nebula®
High productivity
### Controlled disinfection
Precise adjustment of times and cycles for uniform and effective treatment.
High productivity
### Safety for materials and operators
Nebulisation with quaternary salts and a closed system with filtered extraction.
High productivity
### Modular design
Structure separable into two units to facilitate transport and installation.
## Nebula® technical specifications
Nebula is the system for the controlled disinfection of paper materials, integrating atomisation and drying technology into an automatic and safe process.
| TECHNICAL DATA |
|---|
| Maximum book dimensions (W x D x H) | 600 x 440 x 180 mm |
| Machine dimensions (W x D x H) | 750 x 1530 x 1230 mm |
| Operating speed | up to 3 books/min |
| Operating mode | automatic (2 stages) |
| Process | spraying + drying (2 chambers) |
| Disinfectant | quaternary ammonium compounds (QAC) in distilled water |
| Safety system | extraction with HEPA filter for particle containment |
| Structure | modular with wheels, separable for transport |
## How Nebula Works
Nebula® operates through a two-phase process:
1. **Nebulization chamber**: a controlled mist of disinfectant (quaternary ammonium compounds) is applied to the external surfaces of the material.
2. **Drying chamber**: the item is dried through a calibrated airflow system, ensuring complete evaporation without leaving harmful residues.
The entire process is designed to ensure:
- uniform application
- controlled exposure
- operator safety
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## When to choose Nebula®’s controlled and scientific disinfection
The main disinfection methods applicable to paper materials include ethylene oxide, UV light and treatments based on quaternary salts. Nebula adopts the latter approach, using **controlled nebulisation of quaternary salts in distilled water**, selected for their effectiveness against bacteria, mould and viruses and for their **compatibility with conservation practices**.
Disinfection is necessary when **dealing with biological contamination that cannot be managed by cleaning alone**, and when a treatment that is repeatable and safe over time is required.
The need for reliable systems became clearly apparent during **the SARS-CoV-2 health emergency**, when it became necessary to disinfect materials after every use. Approaches based on controlled atomisation have demonstrated the ability to **operate safely even on large volumes**.
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This type of treatment has also been applied in institutional settings, such as at the **University Library of Genoa**, where Nebula was used to disinfect manuscript collections affected by fungal infection. **The treatment was validated through pre- and post-treatment microbiological analyses**, which confirmed the elimination of spores and the absence of recurrence over time.
## Nebula® in operation
Nebula is the automatic machine for disinfection of paper material as books, newspapers, magazines, folders.
## Frequently Asked Questions
**Does Nebula® replace cleaning machines?**
No, Nebula does not replace cleaning machines. [Cleaning](https://www.depulvera.com/solutions/book-cleaning.html "book cleaning") and disinfection are two distinct and complementary stages: first, dust must be removed, then disinfection must be carried out to eliminate biological contamination.
**Does Nebula® use UV light?**
No, Nebula does not use UV radiation. The system is based on the controlled atomisation of quaternary ammonium compounds (QACs), selected for their effectiveness against bacteria, mould and viruses and for their compatibility with the conservation practices for paper materials.
**Is the process safe for books and documents?**
Yes, Nebula is designed to operate in a controlled and non-invasive manner. The treatment acts on external surfaces and includes a calibrated drying phase, preventing residues and preserving the integrity of the materials.
**When is it necessary to disinfect books?**
Disinfection is necessary in the presence of biological contaminants such as mould, bacteria or viruses, or when materials are subject to intensive and shared use.
**What type of disinfectant does Nebula® use?**
Nebula uses quaternary ammonium compounds (QACs) diluted in distilled water, an effective solution that is compatible with conservation practices.
**Is an extraction system required?**
Yes, Nebula operates with a filtered extraction system integrated into the misting chamber, which contributes to operator safety and particle containment.
**Can Nebula® be used on delicate materials?**
Yes, the system is designed to treat archival materials and sensitive documents thanks to a controlled application and calibrated drying process.
## Request Information
Contact us for more information about Nebula or to request a demonstration.
[Contact Us](https://www.depulvera.com/contact.html)[Download Brochure ](https://www.depulvera.com/images/pdf/Oracle-Innovative-Book-Cleaning-Machine_Brochure.pdf)