Variations for Walnut shell / mycelium


Walnut shell / mycelium



Image Credit :

Sebastian Rodriguez


Density 4.446 grams/cubic centimetre
Compressive Strength 1.21 MPa


Step one

Substrate Preparation

1. Sanitize working area with alcohol

2. Wash the walnut shell.

3. Triturate the walnut shell.

4. Sieve the walnut shell in 3mm and 5mm.

5. The walnut shell at 100°C for 60 minutes.

6. Deposit 300g of the substrate in canning jars and then close them. Allow the exchange of air.

Step two

Spawn Mushroom

1. Add 30g of the ‘mushroom seeds’ to substrate and stir.

2. Add 4 tablespoons (40g) of flour.

3. In a clean area, allow the mushroom mycelium to grow for 5 to 8 days.  The spawn is ready.

Step three

Mold Preparation

1. Sketchs the molds.

2. Design the mold in a design software (Rhinoceros).

3. Cut on CNC router (RhinoCam).

4. Thermoform in High Impact Polystyrene (1mm).  The mold is done.

Step four

Growth of the mycelium

1. Remove mycelium material from canning jars and place in mixing bowl.

2. Stir

3. Add 4 tablespoons (40g) of flour.

4. Stir.

5. Fill the molds with mycelium material.

6. Seal the mold with plastic film.

7. Make holes in the plastic film, allowing gas exchange.

8. In a clean area, allow the mushroom mycelium to grow for 8 to 10 days. Almost ready.

Step five

Baking of the material

1. Unfold the mycelium material and put it on the oven in 340°F for 20 minutes.

2. Down the heat to 210° F for 40 minutes. Open the oven door every 20 minutes to allow moisture to escape.  The brick is ready.