The newly reformulated Macs Mud Speckled Buff (MB2 Speckle) is a traditional, iron-bearing, plastic midfire clay body made from 100% New Zealand clays. It offers excellent throwing and handbuilding properties, ideal for both small and large-scale work.

Whats changed?

MB2 Speckle has a few key differences compared to the original Mac’s Speckled Buff:
– White speckle has been removed due to sourcing issues
– Slightly higher shrinkage
– More vitreous at cone 6
– Increased thermal expansion for improved glaze fit

Note: Due to the more vitreous nature of MB2 Speckle, firing above cone 8 may result in warping or bloating. We recommend testing for your specific application.

– Mesh size 50
– Dry shrinkage 5-6%
– Cone 5 – Total shrinkage 12-13 %, Absorption 1.5-2.5%
– Cone 6 Total shrinkage 12-13%, Absorption 1-1.5%
– Cone 7 Total shrinkage 12.5-13%, Absorption 0.5-1%
– Cone 8 Total shrinkage 12.5-13%, Absorption 0.3-0.5%

Recommended Firing Range 1050 to 1300 degrees