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Well mix a small amoubt of glaze  using the strontium carb above mentioned .

If you gavw anotger sourxe of strontium carb mix up same glaze using that .

Place both on pieces of biscuit xlay.

Fire and see if results the same ..

Strontium usually gives vivid blues with copper I think.

Check glazyorg for recipe containing strontium. Used to replace barium carb sometimes

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On 3/18/2019 at 6:38 AM, Babs said:

Strontium usually gives vivid blues with copper I think.

 

I use strontium and get wonderful blues with cobalt, but deep greens with copper.

158014426_IMG_1569(1).jpg.1d6e3f805921477f6eda146c6c52c1e8.jpg

Then one day I expected both these colours on a pot, and found this :

IMG_2004.jpg.e61d91a352b823e6df130a5b3f96fa40.jpg

 

 

Edited by njabeid
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9 hours ago, Sheryl Leigh said:

Thanks Babs - that was kind of my last resort as I'm a bit neurotic about wasting anything, but I appreciate the advice!

Well not wasted can make a small amount and if you like glaze well mix bigger batch of that and pour test into bucket. Only a small batch wasted...or some folk pour all their bits and bobs of glazes into one bucket and see how thst fires...

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1 hour ago, Sheryl Leigh said:

BTW, that bottom pot is really lovely.  Did you just make up a strontium/ water solution  and a copper/ water solution?

Thanks! It was the same strontium glaze used on the bowls, that gives a nice stony matt surface, but whatever happened in the kiln instead of green and blue it came out turquoise and purple. Go figure!Here it is again.

IMG_1974.jpg.1b5199bbb18ba6a0b21b449aa95c594d.jpg

 I fire at 1,120°C, my base glaze recipe is : FF 3124 - 30%, Neph. Sy - 30%, Sr CO3 - 15%, LiO3 - 5%, Wollastonite - 5%, Kaolin - 10%, silica - 5%

 added 1% cobalt carbonate to some I sprayed on the top and bottom (I suppose, since it turned purple!) and 2% copper carbonate on another batch sprayed on the middle.

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10 minutes ago, Mark C. said:

Strontium glaze is like Baruim glaze in as much as the results vary a lot fire to fire.

Thats for sure!  I have one that does such crazy unpredictable things every time, it's getting old!  It's supposed to be a turquoise matte, which it is sometimes...  Sometimes it's glossy, sometimes it's a crater glaze, sometimes it's blue.  You can see in this picture that covering it with a rutile saturated glaze results in a dry matte!  Usually that rutile glaze causes running on other matte glazes!  Craziness I tell you!

 

image-20190318_192138-1612x1209.jpg

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7 hours ago, liambesaw said:

Thats for sure!  I have one that does such crazy unpredictable things every time, it's getting old!  It's supposed to be a turquoise matte, which it is sometimes...  Sometimes it's glossy, sometimes it's a crater glaze, sometimes it's blue.  You can see in this picture that covering it with a rutile saturated glaze results in a dry matte!  Usually that rutile glaze causes running on other matte glazes!  Craziness I tell you!

 

image-20190318_192138-1612x1209.jpg

Well it. Will depend on the two recipes but you have to fettle any bubbles formed at glazing time or they just stau there.

Min advised spraying top of glaze in bucket with hairspray to disperse any bubbles there between stirring and dipping pots.

Mine is very sensitive to glaze thickness. 

In gas it would vary from a satin turquoise to a black matte xepending k. Position i. Kiln and atmosphere.

One glaze a link and blue used to spit off the pot onto shelf. It was banned . Cant remember recipe but beautiful when it did what was expected.

C'est la vie!.. not boring

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18 hours ago, liambesaw said:

Thats for sure!  I have one that does such crazy unpredictable things every time, it's getting old!  It's supposed to be a turquoise matte, which it is sometimes...  Sometimes it's glossy, sometimes it's a crater glaze, sometimes it's blue.  You can see in this picture that covering it with a rutile saturated glaze results in a dry matte!  Usually that rutile glaze causes running on other matte glazes!  Craziness I tell you!

 

image-20190318_192138-1612x1209.jpg

Try the rutile under, maybe it'll run first. 

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22 hours ago, Sheryl Leigh said:

Wonder what it would do at those temps?

My recipe would run straight off your pots, but there are lots of recipes out there for your firing temperatures with strontium in them. Strontium is used to replace barium, which is toxic. It doesn't give colours as brilliant as barium, but can be pretty good! You really need to make some test tiles and try out all sorts of blends and tweaks until you get the surface texture and colour response you like.

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