How to tell if 3D printing materials need to be dried

It is very important to determine whether 3D printing materials need to be dried, especially for materials that are easy to absorb moisture. Here are some ways to tell if a 3D printed material needs to be dried:
Appearance inspection:
Bubbles or pores: If bubbles, pores or other abnormal textures appear on the surface of the printed part, this may be due to excessive humidity.
Color change: Materials with too much moisture may result in darker color or spots.
Print quality:
Interlayer adhesion: If the interlayer adhesion of the print is not strong, it may be due to too much moisture in the material.
Distortion or deformation: Materials with high humidity may be distorted or deformed during printing.
Sound test:
Try bending or folding a small piece of material and listen for a "pop" sound. If there is a noise, it may be because the material contains moisture.
Weighing test:
A short section of material is weighed and then dried in a drying oven for a period of time before being weighed again. If the weight is reduced, it may be because moisture is removed from the material.
Material description:
Check the manufacturer's instructions or recommendations for 3D printing materials, some manufacturers of materials may provide advice and requirements regarding drying.
If you suspect that the material needs to be dried, you can put it in a drying oven for processing, in general, the material is kept in the filament dry box oven for a period of time (depending on the type of material and the degree of humidity) before printing. Through these methods and precautions, you can better judge and deal with the humidity problem of 3D printing materials.