Why is humidity a problem in 3D printing?
Many 3D printing users spend time calibrating their printers, adjusting temperatures, and optimizing slicing profiles. However, there is one factor that often goes unnoticed and can directly affect the quality of the parts: the moisture absorbed by the filament.
Most materials used in 3D printing are hygroscopic, meaning they absorb moisture from the environment over time.
When the filament contains moisture, it turns into vapor as it passes through the hotend, causing visible defects during printing.
Symptoms of a filament with moisture
If you notice any of these problems, humidity may be one of the causes:
- Bubbles during extrusion.
- Cracking or small pops while printing.
- More pronounced stringing.
- Rough surfaces.
- Irregular finishes.
- Lower mechanical strength.
- Loss of dimensional accuracy.
- Inconsistent layers.
These problems particularly affect those who sell printed parts or use 3D printing for production and prototyping.
What materials absorb the most moisture?
Some filaments are especially sensitive:
Very sensitive
- Nylon (PA)
- PVA
- TPU
- PETG
Medium sensitivity
- ABS
- ASA
- HIPS
Low sensitivity (but not null)
- PLA
Even PLA can deteriorate its performance if exposed to humid environments for weeks or months.
What is orange silica gel?
Orange silica gel is a desiccant material designed to absorb moisture from the air and help maintain dry environments.
It is widely used in:
- Industrial storage.
- Electronics.
- Optical equipment.
- Preservation of sensitive materials.
- 3D printing.
Its main advantage is that it incorporates a visual saturation indicator that changes color when it has absorbed a significant amount of moisture.
This makes it easy to know when it needs to be regenerated or replaced.
Why is orange silica gel so useful for storing filament?
Because it helps maintain a more controlled humidity inside boxes, containers, or storage systems.
Among its advantages are:
- Easy to use.
- Does not require electrical power.
- Works continuously.
- Allows protecting multiple rolls simultaneously.
- Visual saturation indicator.
That’s why it is one of the most used solutions by makers, printing farms, and prototyping workshops.
How to use orange silica gel with 3D filament
Ideal for home users.
How to place it
- Insert the spool into an airtight box.
- Place the silica gel in a breathable container or suitable bag.
- Avoid direct contact with the filament.
- Close the box properly.
The silica will start to absorb the moisture from the air inside.
Very common among figure sellers and small workshops.
Recommendations
- Distribute the silica in several points.
- Avoid areas where air does not circulate.
- Check the saturation indicator periodically.
This helps maintain a more uniform absorption
Frequent in technical workshops and companies.
Silica can be placed:
- In trays.
- In perforated containers.
- In specific compartments.
The more airtight the cabinet, the more efficient the preservation will be.
When managing dozens of reels, humidity can simultaneously affect large amounts of material.
In these cases, bulk silica gel is commonly used for:
- Storage cabinets.
- High-capacity containers.
- Centralized conservation systems.
How much silica gel do I need to store filament?
The necessary amount depends on:
- Volume of the container.
- Number of coils.
- Opening frequency.
- Ambient humidity.
There is no universal amount valid for all cases.
That’s why many users prefer to purchase bulk silica gel to adjust the amount used according to the size of their storage system.
How to know if the silica gel is saturated?
The main advantage of orange silica gel is its visual indicator.
When the material absorbs moisture, the color gradually changes, showing that its absorption capacity is decreasing.
This allows:
- To know when to check it.
- To avoid premature replacements.
- To maintain a simple visual control.
Common mistakes when storing filament
- Store the reels in non-airtight boxes
- Use a small amount of silica
- Do not check the saturation indicator
- Constantly opening the containers
Frequently Asked Questions (FAQ)
No. The print quality depends on multiple factors. Silica gel helps control humidity during filament storage.
You can benefit from it, especially in areas with high humidity or during prolonged storage.
Nylon, PVA, TPU, and PETG are often particularly sensitive.
Inside the same container or storage system that holds the coils.
Yes. The necessary amount will depend on the storage volume and environmental conditions.
Gracias a su indicador visual de saturación.
Ambas variantes incorporan indicador visual de saturación. La elección suele depender de la preferencia del usuario y del formato disponible.
Depende de la humedad ambiental, del tamaño del recipiente y de la frecuencia de apertura.
La humedad es uno de los factores más infravalorados en la impresión 3D. Puede afectar tanto a aficionados como a profesionales, provocando defectos visibles, desperdicio de material y pérdida de tiempo.
Utilizar sílica gel naranja o blanca/naranja con indicador de saturación es una forma sencilla de mejorar la conservación del filamento y mantener un mayor control sobre las condiciones de almacenamiento.
Ya sea para una única bobina, una tienda de figuras impresas, un taller de prototipado o una granja de impresión 3D, contar con un sistema adecuado de control de humedad puede marcar una diferencia importante en la consistencia del material almacenado.
