To get clay to stick, especially when joining pieces that are partly or completely dry, you'll need to create a bond strong enough to withstand firing. This is best achieved by using a paper clay glue or slip.
Here's a breakdown of the method:
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Paper Clay Glue (Best for Dry Clay): This is the recommended method for joining clay pieces that are already partially or fully dry, or when extra strength is needed. It's also useful for repairing cracks in dried clay.
- Ingredients: Mix approximately 1/3 wet paper fibers (like from shredded paper or paper pulp) with 2/3 clay by volume. Use the same type of clay as the pieces you are joining to ensure consistent firing.
- Consistency: Add water (and a little vinegar) to thin the mixture into a slurry, similar to a thick paint or glue. The vinegar helps break down the clay and promote bonding.
- Application: Score the surfaces of the clay pieces you want to join. This creates a rough surface that will allow the paper clay glue to grip better. Apply the slurry generously to both scored surfaces.
- Joining: Press the pieces firmly together, removing any excess slurry.
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Slip (Good for Wet Clay): If you're joining clay pieces that are still wet and plastic, using slip alone can be sufficient.
- What is Slip?: Slip is simply clay mixed with water to create a creamy, paint-like consistency. Again, use the same clay body as your project.
- Scoring: Score the surfaces to be joined.
- Application: Apply the slip generously to the scored areas.
- Joining: Press the pieces together firmly and remove any excess slip.
Key Tips for Success:
- Matching Clay Bodies: Always use the same type of clay for both the pieces you are joining and for the slip or paper clay glue. This ensures consistent shrinkage and firing.
- Scoring is Crucial: Don't skip the scoring! This significantly increases the surface area for the slip or paper clay glue to bond to.
- Pressure: Apply firm, even pressure when joining the pieces.
- Slow Drying: Dry the joined pieces slowly and evenly to prevent cracking. Cover loosely with plastic to prevent rapid evaporation.
Using the paper clay glue or slip method with proper preparation is the most effective way to ensure your clay pieces stick together reliably.
