To safely dispose of resin from 3D printing projects, it's crucial to solidify it first. Uncured resin is hazardous and shouldn't be poured down the drain or into the trash. Instead, expose leftover liquid resin to sunlight or use a UV lamp to harden it completely. Once solidified, the resin becomes less hazardous and can be treated as solid waste, making it safe to dispose of in your regular trash. However, always check local regulations regarding hazardous waste disposal, as specific requirements may vary. For containers or tools with resin residue, thoroughly clean them with isopropyl alcohol before disposal or recycling. Being responsible in the disposal process minimizes environmental impact and personal health risks.

To make PVC look like wood, start by cleaning the surface with isopropyl alcohol to remove any grease or dirt. Once dry, apply a primer designed for plastics to ensure paint adherence. When the primer is dry, select a gel stain or acrylic paint in your desired wood color. Apply the paint or stain with a brush, using even strokes to mimic wood grain patterns. For added realism, use a graining tool while the paint is still wet to create wood-like textures. Finish with a clear sealer to protect your work and enhance the wood effect. This process transforms PVC into a wood-like appearance, offering a cost-effective alternative to real wood with the durability and weather resistance of PVC.

Polypropylene (PP) and Polyethylene (PE) are both thermoplastic polymers used widely in various applications due to their favorable properties. Regarding hardness, polypropylene generally exhibits a higher hardness level compared to polyethylene. This difference in hardness can be attributed to the molecular structure of these polymers. PP has a semi-crystalline structure, which contributes to its stiffness and higher melting point. On the other hand, PE is known for its flexibility, which is a result of its less stiff molecular structure, especially in its low-density forms (LDPE). High-Density Polyethylene (HDPE) has greater hardness compared to LDPE but typically still falls short of PP’s hardness. This distinction in hardness directly influences their application areas, with PP being preferred for items requiring higher stiffness and rigidity, while PE is chosen for applications where flexibility is more desirable.