Recipe Name:  Pete's Weathered Bronze

Cone:  6-9     Color:  green bronze
Firing:  Oxidation     Surface:  Matte

Amount     Ingredient
60          Nepheline Syenite
20          Strontium Carbonate
1          Lithium Carbonate
10          Ball Clay--Old Mine #4
9          Silica

100         Total

5          Copper Carbonate
5          Titanium Dioxide

Unity          Oxide
.047           Li2O
.334           Na2O
.106           K2O
.009           MgO
.028           CaO
.475           SrO
1.000          Total

.577           Al2O3
.003           Fe2O3

2.973           SiO2
.005           TiO2

5.2          Ratio
8.8            Exp

Comments:  Metal Marks
Hesselberth leach tested for copper and averaged 5 mg/l which he considered very stable for the amount of copper in the glaze.
Needs a full cone 6 down. Sometimes will pinhole.

Relatively high coefficient of expansion.

Calculations by GlazeMaster™

Example posted by Michele Hartung

Views: 17444

Reply to This

Replies to This Discussion

I tried Barbara's glaze and found the dipped glaze to be uniform and interesting with movement.  However the lightly glazed half of the same pot shows an apparent "weathered" look. The two pics are different sides of the same pot.

There has been lots of discussion re: this and pete's weathered bronze.  Is this and / or seafoam a safe glaze for food, or must I use a lilner for it ?   thank you all for your input.  cp


This is a great weathered looking glaze.  The bronze goes from a clear, bright green to a brownish 

bruised green and is suited to all clay body colors, although it is best on tans. 

60% Nepheline Syenite

20% Strontium Carbonate

1% Lithium Carbonate

10% Ball Clay-Old Mine #4

9% Silica


5.0%  Copper Carb

5.0%  Titanium Dioxide

This is a Pete Pinnell’s strontium glaze tweaked by John Hesselberth (see link above) so the stability and durability is fine.  Needles to say, the fired color of both the Seafoam and Weathered Bronze are almost identical but the 

Seafoam glaze really goes on nicer and seems to fire more evenly.


thank you barbara

/tips hat


What is the colorant for seafoam as compared to bronze? I have a strong blue with 1% cobalt carb. and 3 % copper carb

Pete’s Seafoam Glaze ^5/6

9.6% Ferro Frit 3134

51.3% Feldspar-Kona F4

25.5% Strontium Carbonate

12% EPK


5.0%  Copper Carb

5.0%  Titanium Dioxide

2.0%    Bentonite


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, 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

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