Julie T Posted November 27, 2020 Report Share Posted November 27, 2020 Hello! I need some specific help with using RIO. I typically use stoneware clay #50 from Laguna and bisque to 06-04 and glaze to cone 5. I have applied RIO to my bisque ware and attempted to fire directly to cone 5 alongside glaze. The result was that the RIO had burnt off completely. So, I need specific steps: Bisque normally, apply RIO, re-bisque? What cone? Apply glaze and fire to full cone temp? Do I need to add flux to the RIO? I read 50/50 RIO and Gerstley Borate was needed to prevent the stain from burning out. Please advise. I cannot find any step by step help! Link to comment Share on other sites More sharing options...
Magnolia Mud Research Posted November 27, 2020 Report Share Posted November 27, 2020 I use a mix of red iron oxide and water to mark my logo on my ware, and for decorative marks. Treat the mixture like using water color on paper. To get a good colored mark requires a good application. My mix is about 1/3 of a peanut jar of dry RIO and fill the jar with water. Shake shake shake. I apply on green ware, bisqued ware, and over glaze applications. Works for me at Raku, cone 3, cone 5, and cone 10 +. All kinds of clay body’s. took a few test marks before I got the hang for making good marks. LT Link to comment Share on other sites More sharing options...
Julie T Posted November 27, 2020 Author Report Share Posted November 27, 2020 Thank you Magnolia Mud! I assume that my applications are too light and that is why they burnt off before. I will go for another application and then, should I run it through a second bisque before a glaze firing? Link to comment Share on other sites More sharing options...
JohnnyK Posted November 27, 2020 Report Share Posted November 27, 2020 Hey, Julie...Here is what happened to a couple of my little flowerpot gremlins...the one on the right has 3 coats RIO on ^04 bisque fired to ^06. The RIO was just a tad chalky. So I thought it would be a good idea to put a clear glaze (3 coats) and refire to ^06. The result was the mottled yellow and black one on the left. I have done RIO and fired to ^10 and the result without clear was a semi-metallic gun metal gray color that was permanent. Something to consider... Link to comment Share on other sites More sharing options...
Min Posted November 27, 2020 Report Share Posted November 27, 2020 3 hours ago, Julie T said: I will go for another application and then, should I run it through a second bisque before a glaze firing? If you aren't glazing it then no it isn't necessary to re bisque fire. If you are glazing the iron can smudge if not bisqued on first. Do a test tile at the same time, try a heavy dark application, a medium one and a light one, try one coat and two or three, see what happens. If you glaze over an iron wash or apply the wash over a glaze if there is a high amount of calcium in the glaze the iron will tend to "bleach" out and go a straw colour. Link to comment Share on other sites More sharing options...
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