1 Layer: Code: 2B - 1C - Y

2 Layers: Code: 2B - 10C - R and 2B - 3B - R

2 Layers: Code: 2B - 3D - R and 2B - 3D - B

2 Layers: Code: 2B - 5E - B and 2B - 11E - B

2 Layers: Code: 2B - 9B - B and 2B - 11D - B

2 Layers: Code: 2B - 5B - B and 2B - 11D - B