deep crimson mason (6006) stain turns a pale brown

[Rita Mattson]

I like to experiment with mason stains for some of my pieces that are fired at cone 6.  Crimson is one of my favorite colors but I can never count on what color I will get.

Perhaps it is the colors it comes in contact with?  I have attached two pieces, one using the colors tangerine,  praseodymium #6450 and crimson; and the other teal, praseodymium and crimson.   Can anyone tell me why the crimson has turned pale brown in the orange/yellow piece, but shows up crimson against the yellow and teal?  I'm not a chemist, but from color theory I would have expected the teal to muddy the crimson.

What should I be doing to insure a deep crimson after my glaze firing?

Thanks for any advice.

 

 

[liambesaw]

It will turn brown if there's zinc in the glaze, I believe it also needs a sufficient amount of calcium in the glaze as well.  Best to look it up on their reference page.

Http://masoncolor.com/reference-guide

[Roberta12]

8 hours ago, liambesaw said:

It will turn brown if there's zinc in the glaze, I believe it also needs a sufficient amount of calcium in the glaze as well.  Best to look it up on their reference page.

Http://masoncolor.com/reference-guide

Thanks @liambesaw     I was waiting for a more knowledgeable person to respond.  When I was trying to get crimson I discovered the inclusion (Cerdec)  stains,  Rita, you might  want to look at those.  The oranges and yellows and reds stay more true.

Roberta 

[Rita Mattson]

thank you liambesaw and Roberta12... nice to know about the Cerdec stains.

[oldlady]

red, the bright red color, can be had with stroke "N coat.