Filament is an important part of 3D printing, and moisture can cause big problems during printing. But how can you tell if filament is wet? Some types of filament become brittle when they absorb moisture.

In this guide, we'll explain why filament gets wet and how to tell if it's wet. We'll also provide tips to prevent damage to your prints and walk you through easy steps to protect your filaments from moisture.

Want to keep your 3D prints safe? Keep reading and get started!

Why Does Filament Get Wet?

You might want to explore the factors contributing to filament moisture in 3D printing. It could cover aspects such as:

• Environmental Humidity: Filament exposed to high-humidity environments will absorb moisture faster. Moisture absorption occurs even at relatively low humidity levels, affecting the filament's quality.

• Improper Storage: Inadequate storage conditions, such as leaving filament spools open or storing them in humid areas, facilitate moisture absorption.

• Filament Composition: Some materials, like nylon, possess a molecular structure that readily attracts moisture, making them more susceptible to absorbing moisture compared to other filaments.

Signs of Filament Getting Wet

To reduce losses, it's important to recognize signs of filament moisture. This will help identify issues caused by wet filament.

Now, let's look at the specific signs that filament moisture may be present.

#Sign 1: Stringing

Stringing is a problem that occurs when there are thin strands of plastic between the parts of a print. It is a sign that there is moisture in the filament. This happens when the filament extrudes more than necessary. That makes unwanted fine threads that connect different sections of your print.When filament absorbs moisture, it tends to bubble and pop in the hot end of the printer. This causes irregularities in flow and pressure that result in stringing.

You might also see a decrease in the quality of your print, like a rough texture or weak structure. Another sign of moisture in the filament is steam or hissing sounds coming from the hot end of the printer. If you see these symptoms, you can check your 3D printer and make sure it's running well.

#Sign 2: Surface Roughness

Surface roughness is a sign that the 3D printer filament has absorbed moisture. When filament gets wet, it tends to have surface imperfections, which lead to a rough texture on the printed models. This roughness can be seen as uneven surfaces, irregularities, or bumps on the printed object.

Moisture in the filament causes steam or bubbles to form during the printing process. This can lead to inconsistent extrusion and adhesion between layers. This can make the printed object less than perfect, both in how it looks and how well it's made.

#Sign 3: Popping, Hissing, or Sizzling Sounds during Printing

Popping, hissing, or sizzling sounds during the 3D printing process can serve as auditory indicators of filament that has absorbed moisture. These unusual noises occur due to the presence of water vapor or moisture trapped within the filament material.

When filament absorbs moisture, the water content turns into steam as it encounters the high temperatures within the hotend of the 3D printer during the printing process. This rapid conversion from liquid to vapor results in popping or hissing sounds emanating from the nozzle.

These sounds can disrupt the smooth flow of the filament through the nozzle and adversely affect layer adhesion, resulting in an inconsistent extrusion pattern and compromised print quality.

#Sign 4: Poor Layer Adhesion

If the layers of a 3D print don't stick well, it might be because the filament has absorbed moisture. This can cause little bubbles to form in the filament, which can disrupt the print process.

These bubbles can prevent the layers from fusing properly, which can lead to weak adhesion and a less sturdy printed object.

#Sign 5: Print Defects like Bubbles or Warping

Print defects like bubbles or warping in 3D prints often suggest the filament has absorbed moisture. When moisture inside the filament heats up during extrusion, it turns into steam, forming bubbles. 

These bubbles mess up the smooth flow of molten filament, causing unevenness or holes in the print, which affects how strong and quality it is.

Warping happens when the moisture causes uneven cooling within the printed layers. As the filament cools at different rates, some areas contract more than others, leading to distortions or deformations. This results in sections of the print lifting off the bed, causing a warped or distorted final product.

What to Do to Prevent the Filament from Getting Wet?

After learning how to tell if your filament is wet, you can try to avoid the issue of moisture in 3D printer filament. Here are some strategies to keep your filament from getting wet:

Store Filament Properly

Proper storage plays a crucial role in preventing filament moisture absorption. For example, you can use airtight containers or resealable bags to store your AnkerMake 3D printer filaments. Be sure to store it properly in humid months.

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Avoid Humid Environments

Keep filament away from areas prone to high humidity. Store filament in a cool, dry place, away from direct sunlight and damp areas, to minimize exposure to moisture.

Use Desiccant Packs

Desiccant packs, such as silica gel or other moisture-absorbing agents, are effective in reducing moisture. Place desiccant packs inside storage containers to maintain low humidity levels around the filament.

Consider Filament Dryers

Investing in a filament dryer can be beneficial, especially for filaments that have already absorbed moisture. Filament dryers help to remove moisture and restore filament to its optimal condition before use.

Final Thoughts

In conclusion, knowing how to identify if your filament is wet is essential for maintaining its quality. If you notice signs of moisture, it's important to act quickly to prevent further damage. Regularly check your filament, store it in dry conditions, and consider using vacuum packaging to reduce moisture-related issues. By taking proactive steps, you can protect your filament and extend its life for all your printing needs. Staying informed and cautious will help you avoid potential problems down the road.

FAQ

Do all types of filament absorb moisture at the same rate?

No, different filaments absorb moisture at different rates. Filaments like nylon, PVA, and some composite materials absorb moisture quickly, while others like PLA or PETG absorb much less. The rate depends on the filament's chemical properties.

Is there a way to measure the moisture content of filament?

There isn't a specific moisture meter for filament, but you can spot signs of moisture like stringing, popping, or steam while printing. You can also weigh the filament before and after drying it. If it weighs less after drying, it means moisture was removed. Using a filament dryer with humidity settings can also help manage moisture levels.

How often should I check and maintain my filament storage conditions?

You should check your filament storage regularly, especially in humid environments or if you don't use the filament often. A good rule of thumb is to check every few weeks or at least once a month. Keeping your filament in a dry, controlled environment will reduce the need for frequent checks.