If a link does not appear under each raw material you add to a glaze recipe, after saving, the chemistry does not calculate correctly.

In this example,  Frit 3134  is not recognized as a raw material.

If this happens, click the blue "Our Materials" tab and check "Show Reference Materials" to look-up the correct term for the raw material.

Searching for Frit 3134 provides the correct raw material names, with Ferro Frit 3134 being one possible choice.

My preference is to add bentonite to the main glaze recipe because it alters the glaze chemistry, but others sometimes make a different choice.

George Lewter also would prefer us not to click on the Auto-Assign link for C6G, C6S, C6B, until after someone has uploaded a photo of the glaze.  In this example, C6G-1299 was assigned for glaze 3M-4 prior to uploading a photo example.

Views: 132

Reply to This

Replies to This Discussion

Thanks for this info Norm.  I will be testing glazes this week.  I have added a couple of glazes in the past.  Hope to post pictures to the successful reciepes in two weeks.  I had one I could not get to work even after two tries.  Should I make a note in the comments section of the issues? (blisters)

When I first started working with glaze recipes I quickly realized that there are many "glaze recipes" posted on the internet which are either:

1.) missing one or more ingredients;

2.) intended for a different cone;

3.) intended for reduction rather than oxidation;

4.) were never an actual glaze in the first place.

I call these "rumors of a glaze".

It's not hard to imagine how mistakes can be made and accumulate as recipes are retyped and passed from one person to another over time.

Unless I can figure out what is wrong with the failed glaze recipe, it's not really a glaze recipe. So it doesn't get auto-numbered and I eventually delete it.

But I do trial new glazes on various clays.

I've been periodically amazed at how differently a "reliable glaze" can suddenly fire completely differently when someone at our studio tries it on a different clay.  This is worth noting.  Every time we order clay we purchase old favorites and a couple of new types Laguna has on offer.

We've also previously had problems using cone 10 clays at cone 6 which remains too porous, resulting in continuous off-gassing and pin-holing with some glazes, often those with a lithium flux, as the glaze interacts with the interior of the "clay sponge".

We recently had bloating problems with WC-403 Speckled Buff, as the granular manganese inclusions (the brown speckles) begin to off-gas at Cone 6, as noted in Digitalfire.  — http://digitalfire.com/4sight/troubleshooting/ceramic_troubleshooti...

In the Orange Street recipe I note the significant difference in gloss when using the glaze on an iron containing clay rather than a white clay with a photo of each.

I've also contributed glaze photos from glazes fast-cooled and later from slow-cooled kilns when we switched our firing schedule. I had to reformulate a few glazes with additional high-flux frit to accommodate the changes created by our slow-cooling schedule — so these are all essential parts of the recipe, just as what range of cone it's intended for.


This information hit me like a load of bricks.  I have been having a terrible year clay wise.  I moved and since have not been able to get my clay and glazes to work like in the past.  I have since been trying out new clays and new glazes.  It has been one disaster after another.  Last load I threw away 90% of the pots in my 9 cubic ft. kiln.  I have only tried reciepes that come from reliable sources.  The one I have been having so much trouble with I used at a community studio.   I have since begun to question my clays.  Was using Standard 181, cone 6 to 10.  Several of my glazes will only fire up to cone 5 1/2.  Going to my clay suppliers website I only saw one clay that was said to vitrify at cone 5.  Further research and I discovered that the clay companies have other clays, my supplier just didn't carry them.  The nightmare continues.  I was hoping to do some spring craft shows. Not happening now. 

So I will try out new clays this week, new glazes, and we will see what happens.

As always, I appreciate your help and advice.

Reply to Discussion



  • Add Videos
  • View All

Use These Links to Support Us

Low cost flat lapping disc can be used on you potters wheel if you, drill bat pin holes in it, and provide a trickle of water to cool it. At amazon.com, 120 grit for aggressive material removal. Click the image to purchase 

Members have had great things to say about John Britt's new book, Mid-Range Glazes. Click the image to buy from Amazon.com

Purchase Glazes Cone 6 by Michael Bailey, The Potters Book of Glaze Recipes by Emmanuel Cooper, or Making Marks by Robin Hopper, all available at amazon.comMastering Cone 6 Glazes by John Hesselberth & Ron Roy is now out of print.

Harbor Freight is a great place to find unbeatable prices for better HVLP spray guns with stainless steel parts and serviceable economy models, as well as detail guns, all tested by our members for spraying glazes, as well as compressors to power the guns. As yet no one has tested and commented on the remarkably inexpensive air brushes at harbor freight.

The critter siphon gun is a spray alternative that is well liked by some of our members, and is available at amazon.

Amazon is also a competitive source for photo light tents for shooting professional quality pictures of your work. They also have the EZ Cube brand favored by several of our members. You might also want to purchase the book Photographing Arts, Crafts and Collectibles . . .

If you are up to creating videos of your work or techniques you might want to invest in a flip video camera

Following are a few scales useful for potters. Ohaus Triple Pro Mechanical Triple Beam Balance, 2610g x 0.1g, with Tare $169.00

And finally a low cost clone of the OHaus. The Adam Equipment TBB2610T Triple Beam Mechanical Balance With Tare Beam $99.62

ebay is a great alternative for many tools and the equipment used in the ceramics studio - kilns, wheels, extruders, slab rollers are often listed there both new and used.

Tips for Members

If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014

© 2022   Created by Andrea Wolf.   Powered by

Badges  |  Report an Issue  |  Terms of Service