DIY Casting Powder Pen Holder Tutorial
Looking for a sturdy yet stylish pen holder without breaking the bank? Try making your own with casting powder and discover how easy it is to create a practical piece with a beautiful marble-like finish. Perfect for keeping pens and stationery neatly organized, this DIY project is minimalist, chic, and surprisingly fun to craft—bringing both function and elegance to your desk!
Difficulty: ★★☆☆☆
Crafting Time: About 1 hour
Material Preparation
- Materials: Resin casting powder all-in-one kit, water, pen holder mold, and colorful crushed stones
- Tools: mixing sticks, electronic scale, measuring cups, sandpaper
- Protective Equipment: Always wear nitrile waterproof gloves, a waterproof apron, and a respirator for safe handling.
Environment Setup
- Ideal Conditions: Maintain a temperature between 73–78°F with humidity no higher than 50–60% RH.
- Ventilation: Work in a well-ventilated area, ideally near a window or use an air purifier for better airflow.
Step-by-step Instructions
Step 1
Weigh the casting powder and water in a 3:1 ratio by weight, then slowly add the casting powder to the water in batches while stirring. Complete the mixing process within 4–6 minutes.
Tip: Keep the water temperature between 68–77°F (20–25°C). Higher temperatures may accelerate curing and make mixing difficult.


Step 2
Sprinkle crushed stones into the mold, then pour in the prepared casting powder mixture. Allow it to set for 30 minutes.
Tips:
- Gently tap the mold by hand to release air bubbles.
- Do not move the mold for 15–20 minutes after pouring to prevent structural damage or cracking.


Step 3
After demolding, check the edges of the finished piece for sharpness. You can use sandpaper to smooth them if needed.


Pro Tip
The finished crafts are best suited for decorative or storage purposes. Regular casting powder trays are not food-safe and should not come into direct contact with food due to risks of chemical contamination and microbial growth.


