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Crocus Martis Yellow? Grog Brains.


Karen B

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I must have grog for brains. I was mixing up 5 large batches of glaze yesterday.

Despite careful planning, I miscalculated and was short the amount of Yellow Ocher I needed for one,

which is to be a translucent green glaze, which I discovered about 11pm.

I was despairing, because schedules, deadlines, you know. I came across a bag of Crocus Martis Yellow.

It looked exactly the same! Yes, I used it to finish the glaze.

Now, as I am sieving, I notice some redness in the strainer.

PLEASE TELL ME IT IS NOT LIKE RED IRON OXIDE! Please tell me it is yellow when fired.

Just tell me the truth. Am I screwed?

Thank you,

Karen

 

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You now will have a new glaze one that is most likely a bit different from what you expect.

Since you did nor mention how much you put in? I would treat this like a glaze test

and not glaze all you work but just a few things until you know what you have.

Mark

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Hope the person who was not going to kiln wash her shelves is reading......

Good luck Karen.

Got the chem comp of Yellow ochre?? FeOH

Prob will be paler as from reading, crocus martis unless calcined will gas off a lot in firing. therefore weight for weight it will give less colouring effect.( I think) Croc  FeSO4

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Hope the person who was not going to kiln wash her shelves is reading......

Good luck Karen.

Got the chem comp of Yellow ochre?? FeOH

Prob will be paler as from reading, crocus martis unless calcined will gas off a lot in firing. therefore weight for weight it will give less colouring effect.( I think) Croc  FeSO4

Wanted to thank you for the chem comp Babs.

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Ah intuition somewhere you knew it was ok!  Nice glaze Karen it really picks up the texture.  Now what is cheaper? Crocus or Ochre? 

 

,Thanks Babs.   I'll have to remember to look at the catalog when I go into the studio to look it up.

 

I don't think it is calcined, doesn't say on the label.

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