This is how much iron is in 50lb of the cleanest pugged porcelain you can make!

Thursday 13th October 2016

The recipe: 50% New Zealand insight-live.com/material/925">kaolin, 21% G200 Feldspar, 25% silica and 3% VeeGum (for cone 10R). These are the cleanest materials available. Yet it contains 0.15% iron (mainly from the 0.25% in the New Zealand kaolin, the VeeGum chemistry is not known, I am assuming it contributes zero iron). A 50 lb a box of pugged would contain about 18,000 grams of dry clay (assuming 20% water). 0.15% of 18,000 is the 27 grams of iron you see here! Even more surprising: This mug is a typical Grolleg-based porcelain using 5% of a standard iron-bearing raw bentonite. A box of it contains four times as much iron. Enough to fill that cup half full!

Pages that reference this post in the Digitalfire Reference Library:

Iron Oxide Red, New Zealand Halloysite, This iron oxide stain on porcelain disappeared during firing?, Porcelain

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.