[Clayart] Ron Roy fake maiolica problem

[vpitelka at dtccom.net]

I don't have a solution, but wanted to interject my own comment about this glaze.  I wasn't trying to do the maiolica technique, and instead planned to use it as a white liner in cone-6/7 soda-fired pots.  I did not have any pinholing, but it did show ever drip and overlap that was present in the unfired glaze coating.  It was way to tight and refractory for my needs, and on many pieces came out matt.  It was best near the firebox where it got quite a bit of soda.  Perhaps Ron Roy will have a suggestion.  I subsequently mixed up the MC6G clear liner and added 10% Zircopax, and got exactly the white liner I wanted.  That's what I should have done to begin with.  
- Vince

Vince Pitelka
Professor Emeritus of Art/Ceramics
Appalachian Center for Craft
School of Art, Craft & Design
Tennessee Tech University
Now Residing Chapel Hill, NC
vpitelka at dtccom.net
www.vincepitelka.com 

-----Original Message-----
From: Clayart <clayart-bounces at lists.clayartworld.com> On Behalf Of Bryan Johnson
Sent: Wednesday, February 26, 2020 4:06 PM
To: Clayart international pottery discussion forum <clayart at lists.clayartworld.com>
Subject: [Clayart] Ron Roy fake maiolica problem

I am forwarding this from a facebook group. (The recipe was the same as in the book) Hi, I fire at cone 6 and use MCS Tucker’s Clay. I am looking for a white satin maiolica glaze that let the underglaze colors looking bright and sharp. I’ve tried this recipe and love the results but it has pin holes, crawls, leaves running drips and is very powdery. Any suggestions to correct these problems?

Bryan Johnson
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