What is Cold Porcelain?
Cold porcelain is an air-dry modeling clay made from simple household ingredients like cornstarch and white glue. It dries hard without baking and is popular for crafting delicate flowers, figurines, and decorative items.
Basic Cold Porcelain Recipe
| Ingredient |
Amount |
Purpose |
| White Glue (PVA) |
1 cup (240 ml) |
Binds ingredients, flexible base |
| Cornstarch |
1 cup (120 g) |
Adds texture and firmness |
| Vaseline or Baby Oil |
1 tbsp |
Softens clay, prevents cracking |
| Lemon Juice or Vinegar |
1 tsp |
Preservative, prevents mold |
| Glycerin (optional) |
1 tsp |
Adds elasticity and shine |
Preparation Steps
| Step |
Description |
Tips |
| Mix glue and oil |
Combine white glue and Vaseline/oil |
Use a bowl or non-stick pan |
| Add cornstarch |
Slowly sift and stir in cornstarch |
Avoid lumps; mix thoroughly |
| Add lemon juice |
Add preservative |
Helps keep clay fresh |
| Heat gently |
Cook over low heat, stirring constantly |
Thickens into dough consistency |
| Knead when cool |
Knead dough on clean surface |
Makes clay smooth and pliable |
| Store in airtight container |
Prevents drying out |
Wrap in plastic wrap if needed |
| Tool |
Use |
Notes |
| Rolling Pin |
Flatten clay sheets |
Small size preferred |
| Craft Knife / Scalpel |
Cut shapes and details |
Sharp blade recommended |
| Modeling Tools |
Shaping, texturing |
Silicone or wooden tools |
| Paint Brushes |
For painting dried pieces |
Use acrylic or water-based paints |
| Sandpaper (fine grit) |
Smooth dried surfaces |
Optional for finishing touches |
| Glue (PVA) |
For assembling parts |
Use on dry or semi-dry clay |
| Sealant |
Adds durability and shine |
Matte or gloss varnish |
Modeling Tips
| Tip |
Explanation |
Benefit |
| Work in small batches |
Keeps clay fresh and manageable |
Avoids drying or hardening too soon |
| Keep hands clean |
Prevents clay contamination |
Smooth finish without grit |
| Use cornstarch for dusting |
Prevents sticking |
Easier rolling and shaping |
| Store unused clay wrapped |
Retains moisture |
Extends clay usability |
| Sculpt details before drying |
Add texture and fine features |
Better control before hardening |
| Use toothpicks/wires |
Supports delicate parts |
Prevents breakage during drying |
Drying & Curing
| Method |
Description |
Drying Time |
| Air Dry (Room Temp) |
Leave pieces on flat surface |
24–72 hours depending on thickness |
| Fan or Dehumidifier |
Speeds drying process |
12–24 hours |
| Avoid direct sunlight |
Prevents cracking or warping |
N/A |
| Thin pieces dry faster |
Small details need less time |
12–24 hours |
| Thick pieces may crack |
Use gradual drying and supports |
Support with wires or foam |
Painting & Finishing
| Step |
Product Used |
Tips |
| Base Coat |
White acrylic paint (optional) |
Provides uniform surface |
| Detail Painting |
Acrylic paints or inks |
Use fine brushes |
| Seal |
Matte or gloss varnish |
Protects and enhances durability |
| Embellishments |
Glitter, beads, or powders |
Apply after sealing |
Troubleshooting
| Problem |
Cause |
Solution |
| Clay too sticky |
Too much glue or moisture |
Add more cornstarch, knead well |
| Cracks after drying |
Drying too fast or too thick pieces |
Slow drying, add oil to recipe |
| Clay crumbles |
Too dry or old clay |
Add small amount of water or glue |
| Surface sticky after drying |
Insufficient drying or humidity |
Let dry longer or seal properly |
| Uneven texture |
Poor kneading or mixing |
Knead thoroughly before use |
FAQ
Can cold porcelain be baked?
No. It is air-dry only; baking may cause cracking or melting.
How long does cold porcelain last?
Stored properly in airtight containers, up to 2 weeks fresh, longer if refrigerated.
Can I colour cold porcelain?
Yes! Mix acrylic paint or powdered pigments into dough before kneading.
Is cold porcelain safe for kids?
Yes, non-toxic ingredients, but supervise young children.