Babs

There was a glaze recipe, midfire giving similar finish, satin to gloss using petalite and copper carb, from memory. If it comes to me, I'll post it. Cone 07 to c03 Frit 3110 85% Bentonite 2.5% Petalite 12.5% Copper Carb 5.8 seems high Chrome oxide 0.2. Note says crazes on most normal bodies. Glaze needs to be well set up with CaChloride to avoid settling. Comes from Stan Eley's "Australian Fritted glazes" 1978

Think the blue is from Copper Carbonate, maybe a smidgeon of Cobalt, just my opinion.

Research majolica glazes and Linda Arbuckle, she is the best.

Oh now I have to choose mentally, ( my son gave me a gift voucher for $150 ) and with Pres's I would have 300!!! Prob only $150 of Callie'sCanadian Power drill of my own, mmm, delicious New worktable...., well just think I need proper tool organisers and brush holder. Put $ towards slab roller..... Prob. My indecision shows nothing screaming at me.

Wrt @neilestrick point, you can use a slate sealer or other product to seal the surface which contacts the wall . If seepage significant on other surfaces, i.e. dripping moisture to a floor then may have to seal inside of pots as well. Damp clay pots can harbour molds, some folk may be sensitive to this. Sealing the inside should prevent this.

Could add a soak at end of schedule, say 20 mins and watch your cones through peep hole. Or set end temp to1020 and watch as above for cones to touch toes. May be your thermocouple is on way out or needs an offset. Depends on controller type how you go about this.

If everything completely dry, for a bisque, ware is not thick, you could set it at 100°C/hr to 600°C. A photo of controller would help others give more helpful answers.

Perhaps if enougb of us we could get free testing!

Have you kept a log ? Even of last firing befors controller screen was broken? Length of firing etc? Are you a aware of còlour change in kiln at various temps? No to these questions and you really are in the dark. Any chance of firing in a friends kiln till controller sorted?

Unlikely you will find one,imo. @Min gave the reason. Chuck that bag of Gerstley out unless someone has the knowledge to identufy the substance it contains. Get a check sheet going when you mix glazes, double check yourself...we've all, well I've had similar brain lapses or interruptions in the midst of making batches of glaze. Tick substance, tick weight, tick into the bucket, that substance off the table.

Wha is the number or name on Glazy, perhaps you adean error copying that. If bentonite aded in any large quantity, i would be so lumpy in the buckrt and hard to sieve

Top one, one you like? Left out the cobalt, ? Prob not as sipmple as that because bottom image is a runnier glaze . Second batch same firing schedule, same Specific Gravity?

Yes, wrong word, may need to slide brick over part of top hole to reduce the suck out of hole, alonG with playing down the gas

Are you overdoing it re trying to get zero reduction? All the heat at the business end of firing going up the chimney? May be need to do a bit of playing with the damper to stop heat loss

Ah our haptic seses are fully developed! Keep in touch, be in the moment etc etc. Good at shutting out the irrelevant when immmersed, apologies for cross references!

Monkey brains, you guys, no AI would calculate whete you are going @Hulk and @Dick White Straight from glaze formulation to turbulent waters:-)))

Apply liberal amounts of super glue to fingers when handling pots :-)

Good point . I got my kiln hard wired and wiring and fuse box changed to avoid what you write about @Kelly in AK when noticing heating at power point. And so in wall and roof! What was happening in the neighbourhood? In your roof? The pots may be just raw like @neilestrick suggests.

Also there is a difference between glaze stains and body stains.

Does your kiln glow red in all elements if you were to start it up on high for 15mins? Doez the smell/ smoke perist?

Also , you dont have to invent the wheel. Folk ha1ve been using coloured slip fir a long tIme. I suggest you tap in to other folks testings , select a range you like , remembering the colour of your clay body may have an effect and also your top temperature. Get a palette established for your pottery and then you may have to purchase just a few...to begin with. All the best

Air sucking back into kiln from leaky damper?

That is what brought me to broad brushstrokes.

Were they subject to a 'draft', unsealed top vent? Oxidising the top shelf, wierd, would you take an order? :-)))))

So you brushed a second layer on inside of bowls? Possible you used another glaze there? Quite crazy, eh? Or a slip over the glaze?