Silica Gel SO1 – Orange indicating desiccant for filaments and sensitive materials

Silica Gel SO1 – Orange is a high-quality desiccant based on silicon dioxide (SiO₂) designed for reliable moisture reduction in enclosed spaces. Thanks to the color saturation indicator, you can immediately see when it's time for regeneration – the beads change color from orange through yellow-brown to green. It is ideal especially for storing 3D printing filaments, but also for protecting electronics, optics, tools, textiles, or other sensitive items from moisture damage.

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Main advantages

• Moisture indicator – the orange color gradually turns to green upon moisture saturation.
• Ideal for 3D printing – keeps filaments (PLA, PETG, PA, PC, TPU etc.) dry and helps prevent popping, bubbles, and poor layer adhesion.
• High adsorption capacity – a specific surface area of approx. 800 m²/g ensures efficient moisture absorption even with a smaller amount of material.
• Reusable – simple regeneration in an electric/gas oven or microwave, without significant loss of effectiveness.
• Safe composition – cobalt chloride-free, the beads are odorless, electrically non-conductive, and insoluble.
• Practical 800 g packaging – suitable for drying multiple filament spools or a larger box.

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Typical use

• Storage of filaments for 3D printing Place the silica gel in a closed filament box, dryer, or storage container. It helps maintain relative humidity well below 50%, which is crucial for e.g., nylon, PA-CF, PC, or PVA.
• Protection of electronics and optics Drying and protection of cameras, lenses, measuring equipment, PCBs, sensors, and other devices during storage or after moisture exposure (in combination with appropriate drying procedures).
• Dehumidification of smaller enclosed spaces Cabinets, showcases, transport packaging, toolboxes, camping equipment, boats/yachts, home and hobby use.

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How the moisture indicator works

As soon as the SO1 silica gel beads absorb moisture, they gradually change color:

• 0 % moisture: orange
• approx. 8 % moisture: yellow-brown (at 20 °C, min. 20 % relative humidity)
• approx. 20 % moisture: brown-green (at 20 °C, min. 50 % relative humidity)
• approx. 30 % moisture: green (at 20 °C, min. 90 % relative humidity)

Once the material is predominantly green, it is time for regeneration.

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Instructions for use with 3D filaments

1. Placement – pour the required amount of SO1 silica gel into a breathable container or bag (textile bag, metal mesh, perforated box) and place it in a closed box with the filaments.
2. Sealing the space – the better the box is sealed, the faster and more effectively the silica gel will reduce moisture.
3. Color check – regularly monitor the color of the beads. Once most of them turn green, perform regeneration.
4. Reuse – after regeneration and cooling, the color returns to orange and the silica gel is ready for the next cycle.

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Regeneration and reuse

In an electric or gas oven

• Recommended temperature: 110–130 °C (can be up to approx. 160 °C according to the technical data sheet)
• Regeneration time: depends on the amount of silica gel and the layer height.

Procedure:

• Spread the silica gel in a thin layer on a baking tray or in a heat-resistant container.
• Dry at the recommended temperature until steam stops rising from the silica gel.
• Let it cool down completely – only then will the color return to orange.

In a microwave oven

• Power: approx. 600–650 W
• Approximate time: about 3 minutes per 100 g of wet silica gel (i.e. ~10 min per 1 kg; adjust time according to the specific amount).

Procedure:

• Use a container resistant to at least 200 °C (heat-resistant glass, ceramics – not metal, not regular plastic).
• Dry in shorter intervals, regularly checking if steam is still forming.
• If steam no longer rises, do not extend the heating further to prevent overheating of the beads and bursting of the container.

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Technical parameters

Parameter	Value
Composition	SiO₂, purity min. 99.5–99.6 %
Saturation indicator	Methyl red 0.09 %
Shape	Spherical beads
Grain size	approx. 2–4 mm
Color (dry state)	orange
Bulk density	620–700 g/l
Specific surface area	approx. 800 m²/g
Pore volume	approx. 0.35–0.45 ml/g
Nominal pore diameter	approx. 25 Å
Regeneration temperature	approx. 110–160 °C
Reuse	yes
Package contents	800 g Silica Gel SO1 – Orange

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Why use Silica Gel SO1 in a 3D printing workshop

• Stable print quality – dry filament means less stringing, bubbles, and surface defects.
• Longer material lifespan – especially for hygroscopic filaments (nylon, PC, PVA, TPU), it significantly extends the period they are usable.
• Economic solution – thanks to repeated regeneration, it is a very cost-effective desiccant in the long run.
• Easy visual monitoring – the color of the beads tells you immediately if intervention is needed.

Silica Gel SO1 – Orange is thus a practical addition to any 3D printing workshop, home and professional operations, where moisture control is key.

Key features:

• Highly effective SiO₂-based silica gel with a purity of min. 99.5 %
• Color saturation indicator – color change from orange to green upon absorbed moisture
• Ideal for storing and drying 3D printing filaments in closed boxes
• Reusable – easy regeneration in an oven or microwave oven
• High adsorption capacity due to specific surface area of approx. 800 m²/g
• Cobalt chloride-free, odorless, electrically non-conductive and insoluble material
• Practical 800 g packaging suitable for multiple spools or larger filament boxes
• Helps prevent corrosion, mold, and degradation of stored materials