Ketchup Red Glaze
Posted 17 November 2012 - 02:34 PM
Posted 18 November 2012 - 04:09 PM
Pic of Randy's red I mixed, cup and saucer, and Coyote Really Red bottles. Randy\'s Red.jpg 26.31KB 38 downloads Red Jars.jpg 30.85KB 36 downloads
Posted 19 November 2012 - 06:36 PM
Encapsulated mason stains will definitely get you bright red -- like those posted above -- but they always look "Crayola" to me. Add up to 10% or so and it's pretty hard to screw up since they're made to do what they say. Underglazes also will work in a pinch - Duncan "Really Red" underglaze is a good liquid form of red to add into your glaze or just use it over/under another.
Also, I've tested many commercial ^06/04 glazes (Like Duncan, Speedball, etc) at ^6 and many of them work just fine without any running (but always test first!!!!) since they're made so dependable and user friendly.
If you're looking for a reduction copper red at ^6, then that's different.
^6 Red to Green (reduction)
20 Neph Sye
^6 Berry Rust
7 Neph Sye
9 Bone Ash
If anyone has other ^6 reds (esp. Cu reds) - mind sharing?
Posted 20 November 2012 - 11:02 AM
Four ways to red
ka Studios Pottery
Posted 28 April 2015 - 12:39 PM
okay.. it has been so long since I have been here complaining about ketchup red not being red that I am not sure that this post will go out there somewhere BUT I need to tell someone that I just emptied my kiln with a whole load of ketchup red with glossy black over and black with ketchup red over. In my 20 years, I have never been so pleased with a glaze. Comes out almost black but with variation on raised areas. It doesn't leave my fnger prints, drips, messes, etc., just a beautiful shiney glaze. I just microwaved a piece and it didn't explode... sometimes life is just good!
Posted 28 April 2015 - 09:22 PM
Posted 28 April 2015 - 09:30 PM
In addition to recipe, do you use a special firing/cooling schedule for your kiln? That would be helpful, too, as iron reds do better with a controlled cooling and a hold at 1600F or so to promote crystal growth.
I've taken a cone 10 iron red (kaki) that came out brown and ran it through a bisque kiln firing . . . with good red results from the third firing.
Posted 29 April 2015 - 08:57 AM
here is one I used with crimson stain and one with iron. Both recipes are listed.
Professor Emerita Montana State University-Billings
Posted 29 April 2015 - 02:18 PM
I've been working with a version of Bailey's Red, modified for Cone 8, but not much ketchup color yet. I may be putting it on too thick. On the other hand, it makes a very useful overspray for some of the other glazes I'm working with.
Posted 30 April 2015 - 11:37 PM
thank you marcia for the recipe for faux celedon on Frost. i can't wait to try something with frost!!! i had heard that glazing it was problematic. thanks again
Posted 30 August 2015 - 08:38 AM
Hi Mary T,
I thought I would write, since I have tried mixing, glazing, and testing that same Ketchup Red Glaze you are talking about from that same book!
I did two test batches of that Ketchup Red and both batches came out brown, just like yours did. For the first test, I used just regular red iron oxide because I didn't have the spanish oxide that the recipe called for. I mixed 3 batches, one with 3% of the oxide, one with 5%, and the other with 7 or 8%. They came out pink and light pink in color. So I purchased the Spanish Oxide and tried again. This second test I mixed two batches, one with 10% of the spanish oxide and the second with 15%. Both also came out brown, but had more red in them.
I fired to Cone 5 with a 30 minute hold in an electric. My next test will be firing to Cone 6 and firing down slowly - as I have read that, too, to fire down slower.
Did you get the glaze to fire to red? What did you do differently?
Posted 30 August 2015 - 09:46 AM
I have found that iron reds at cone 6 are greatly affected by the clay body. I have a wonderful iron red that works great on clay bodies that are lower in silica, such as stoneware clays. Specifically, in my studio we have great results on standard 630 and 112. On porcelain and white stoneware bodies the color is not nearly as good. So it may not be the fault of the glaze or the firing if you're not getting good red.
Kiln Repair Tech
L&L Kilns Distributor
Owner, Neil Estrick Gallery, LLC
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