I am not certain of the origin of this glaze but I got it from the Prince Albert Arts Center and I believe they got it from the Saskatoon Potter's Guild.

 

Custer Feldspar 22

Gerstley Borate 22

Neph Syen 22

Silica 26

Wollastonite  3

EPK  3

Titanium Diox  2

 

Red Iron Oxide  3

Copper Carb  4

Bentonite  2

 

I sprayed the glaze, applying continuously and working around the piece until the glaze started to run.  This gave me a somewhat thick coat which fired to a nice glossy brown with very funky green spots.

Views: 8490

Reply to This

Replies to This Discussion

Thanks Kathy, I will give that a try and let you know how i go with it too. Would you recommend using this glaze on its own or over other glazes. If so, what was your preference.
I've only used it on it's own but I think it may be pretty cool over/under other glazes as well.  I like to make tiles with a scored grid on them to check out the effects of glazes under and over other glazes I use regularly.  Next time I do a glaze fire I'll try frogskin in combinations and post a photo if it's good.
Thanks for your reply Kathy. It does look great on its own, so it will be interesting to see it used with other glazes. I will have to get some Titanium Diox next time i am at my pottery supplier, but i will use it in some tests too and let you know how i go.

is this in an oxidizing, electric firing?

 

I fired this to cone 6 in a vented electric kiln.  Thought this is a vey cool effect for a cone 6 oxidized firing!  A thin coat gives a nice warm brown and thicker gives the speckles.

Once you get used to the conventions, basing everything on 100% makes increasing amounts very simple as for a 100 g test batch you use the same amounts, or you can increase to 500 g by multiplying all by 5 or to 1000 g by a factor of 10 or 1500 by factor of 15, etc.  The items included in the 100% are a base glaze with colorants and modifiers listed separately so they can be changed if you want to try different colours or surfaces.  I have a few glazes that give me a really cool effect such as spots and I can try to get the same effect in a different colour which gives me an infinite array of possibilities with just one base glaze.  A great example of this is Gartside base from which I've gotten great effects such as tea dust, hare's fur, small spots, crystals, etc.  I keep Gartside base mixed up dry and can test by weighing out 100 g and adding colorants and opacifiers.  I also use 50 g amounts of base and add colorants by half (you need a very accurate scale with really small amounts) to see if I am in the ballpark of the effect I want to get, without using a lot of glaze materials.  I have far to  much garbage glaze as I really like to formulate and test glazes!

I hope this hasn't just further confused the issue for you but glaze chemistry is a huge field and I've only scratched the surface. 

Thanks! I'll give it a try!

 

Has anyone tried reformulating this to use a frit instead of Gerstley Borate?  Any suggestions on how to reformulate it.  thanks.

Kathy,

     Thank you so much for this recipe! I've only done a couple of test fires so far, but it is lovely!

Cyndy

I may have posted some of these before. This is a great glaze! The first one is Frogskin, but I'll have to look for what i put on the rim.

On this next bottle, I don't remember what was layered over the Frogskin.

The next 2 are Frogskin on the bottle & then I refired it in a bisque.  Yep, that's all I did.   jhp

Ive wanted to try this glaze since the first post on it.  Add it to my list! nice pictures Jeff, and thanks for sharing Kathy.

I have done a little research since I posted these pics.  It says that I used "Special Sauce" on the rim on the first one.  I still don't remember what that is(No, it's not from McDonalds!).  The second bottle says it was layered with Licorice, Waterfall Brown and Magic.  The 3rd bottle which I refired in a bisque, is just layered with Magic.  Magic is a glaze that the Ceramic Shop sells.  Frogskin will go a little red when refired in a bisque, but not like you see when it was layered with Magic. I just reordered some more Magic & it is on sale in a 6 lb. bag dry.  If you just want to try it, the 8 oz. wet is only $4.00.  Not necessarily plugging the Ceramic Shop, but they do have some good glazes and you can buy them dry as well as wet.  jhp 

Reply to Discussion

RSS

Videos

  • 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

© 2024   Created by Andrea Wolf.   Powered by

Badges  |  Report an Issue  |  Terms of Service