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BlackDogPottery

Rutile Glaze

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Hi.  I was doing some research for trying to make this kind of muddy yellow color and found a few recipes that use rutile. I have some powdered rutile light that I was thinking of using. Any recommendations on how to much to add to a clear for starters? I've never used it before so does it make glazes runnier or anything like that? I was thinking 5% first. Thanks

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rutile will make your glaze runny at least at cone 10 but I bet your are at cone 5?

3-5% is a good start-I would run several tests first on this

There is a article on  rutile glazes in October CM (ceramics monthly) some at cone 10 a base glaze at cone 5

Cone 5 is not my area of knowledge -but Rutile is since I have it made but the ton for me in my own glaze formula from laguna clay every 5 years for a about 30 years now.

Edited by Mark C.

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48 minutes ago, Mark C. said:

rutile will make your glaze runny at least at cone 10 but I bet your are at cone 5?

3-5% is a good start-I would run several tests first on this

There is a article on  rutile glazes in October CM (ceramics monthly) some at cone 10 a base glaze at cone 5

Cone 5 is not my area of knowledge -but Rutile is since I have it made but the ton for me in my own glaze formula from laguna clay every 5 years for a about 30 years now.

Thanks. Yes, cone 6. I'll have to look it up. Have you had much luck making yellows?

Edited by BlackDogPottery

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I feel I should add, rutile makes a runny glaze in reduction, but is refractory in oxidation.  increased iron content causes fluxing.

Yellowing with rutile is a function of that same iron content--in oxidation.  

Edited by Tyler Miller
left out key word runny. oops!

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Small amounts of iron will help. If I remember correctly i've tried 0.5 - 2% black iron oxide with rutile/titanium with some success.

Titanium promotes crystal growth so rates of cooling will affect the results more than most.

 

*iirc titanium acts as crystal 'seeds' but others will know better

Edited by C.Banks

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Rutile works well in these glazes ^6  and these glazes do not run at ^6 if applied at the right consistency. You may need to bump up the percentages of colorants for Oxidation and also the atmosphere will change the color result. So test.

Marci’s Matt ^6 Reduction/Oxidation
EPKaolin        1150           23
Dolomite        1000          25
Neph Syenite 1900       38
Silica                900             18
Whiting           200              4
Gerstley Borate 500     10

Variables:

Reduction colorants but try in Oxidation. They will be different. Very nice satin matt texture

Blue     1% Cobalt Carb
LightGreen1.5%Nickel Carb + 1.5% Red Iron Oxide
Gray 2.5% Rutile +1.5% Nickel Carb
Warm Blue 1% 1% Cobalt Carb+ 5% Manganse Di
Tan  6% Manganese Di. +2.5 Red Iron Ox +1%        
   Rutile OR try using only  5% Rutile as a colorant
 

White Liner ^6 Reduction/Oxidation
Ger. Borate           20
Neph. Syenite                 30
Kaolin                              13.3
Whiting                                 9.4
Talc                                      17.2                       
Silica                               10
Zircopax                         10

These are for reduction colorants:

ADD :Pumpkin 5% Red Iron + 3% Rutile
Gold  3% Rutile
Lt. Blue  0.5% Cobalt Carb
 

Marcia

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12 hours ago, Marcia Selsor said:

Rutile works well in these glazes ^6  and these glazes do not run at ^6 if applied at the right consistency. You may need to bump up the percentages of colorants for Oxidation and also the atmosphere will change the color result. So test.

Marci’s Matt ^6 Reduction/Oxidation
EPKaolin        1150           23
Dolomite        1000          25
Neph Syenite 1900       38
Silica                900             18
Whiting           200              4
Gerstley Borate 500     10

Variables:

Reduction colorants but try in Oxidation. They will be different. Very nice satin matt texture

Blue     1% Cobalt Carb
LightGreen1.5%Nickel Carb + 1.5% Red Iron Oxide
Gray 2.5% Rutile +1.5% Nickel Carb
Warm Blue 1% 1% Cobalt Carb+ 5% Manganse Di
Tan  6% Manganese Di. +2.5 Red Iron Ox +1%        
   Rutile OR try using only  5% Rutile as a colorant
 

White Liner ^6 Reduction/Oxidation
Ger. Borate           20
Neph. Syenite                 30
Kaolin                              13.3
Whiting                                 9.4
Talc                                      17.2                       
Silica                               10
Zircopax                         10

These are for reduction colorants:

ADD :Pumpkin 5% Red Iron + 3% Rutile
Gold  3% Rutile
Lt. Blue  0.5% Cobalt Carb
 

Marcia

Thank you Marcia. I know it has this in the title of the recipe but is this a matte or satin? I'd love to find one that could be used on the outside of mugs and stuff

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I like to add rutile to a lot of my glazes, just something that it does to the surface, the crystal growth, and the durability of most glazes. I usually start with at least 4% and work upward. Nice with tin oxide. I use a base glaze using Zircopax, Rutile and tin oxide.

 

best,

Pres

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11 hours ago, BlackDogPottery said:

Thank you Marcia. I know it has this in the title of the recipe but is this a matte or satin? I'd love to find one that could be used on the outside of mugs and stuff

buttery matt. satin  Very good for baking dishes and easy to clean.

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Update. I added rutile to my base glaze and it didn't come out anything like I would imagine. 

4.5%  Rutile . A soft grey that unusually turned black manganese specks to an orange rust. Bizarre to me as I was expecting a yellow. However its pretty nice to me and cant wait to use it.

https://imgur.com/leYKL0Z

 

4.5% Rutile : 4.5% Red Iron. Even more surprising was this odd shade of black 

https://imgur.com/OEQTuvv

Edited by BlackDogPottery

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