Talk To Me About Various Grogs Available

[anchorman]

I'm going over things that need ordering and one of my suppliers has multiple types of grog available.  We have mostly used the mulcoa/ce minerals m47-35 over the years, but have also had a batch of stuff shipped out once from christy minerals.  The mulcoa stuff is listed as "white mullite grog", and costs about 42-44¢/lb.  the christy minerals stuff is listed as MO fireclay grog, and goes for 24-26¢/lb.

Am I going to see much difference in my stoneware body between the two?  Does anyone have insights into using these two and which they prefer?  From the data sheets, it looks like the mulcoa grog is a slightly more controlled/refined product, which is reflected in the price...  for an iron bearing stoneware, maybe this isn't a big deal? Saving 50% on materials costs is awesome, though.



http://imerys-refractoryminerals.com/wp-content/uploads/2014/09/Mulcoa-range.pdf

http://www.christyco.com/pdf/cmc/calcined-flint-clay.pdf

[glazenerd]

I have not used mulcoa, but Christy Minerals clay mine is about two hours from me. I have used their grog before, still have some out there: no complaints. 50f mesh