[Wood ash glaze strange patina]

Thank you Neil! This is useful, I thought it could be just an unmelted situation or something else more chemical that I cannot yet recognise 

do you think I should just leave alone this testing? And make a proper ash glaze? Any more insight would be appreciated 

[Wood ash glaze strange patina]

Hi Mark, thank you for your reply. 
I am just trying out with some thick wood ash concentration because I cannot yet invest time in making a proper wood ash glaze. I am learning really… 
 

Do you think that that patina is just because of the thickness of the glaze? 
 

I have tried on other small cups and the results are not food safe but beautiful looking. At least to me   You can see the test in the photo

 

thank you again,

Valeria 

[Wood ash glaze strange patina]

Hi,

I was wondering if you could help me understand why the wood ashes created that opaque patina in the centre of this bowl and if you think a refire could help. 
 

I mixed unwashed dry ashes to a neutral glaze I regularly use and thickly brushed  the mixture on the thinly glazed bowl you can see in the picture, fired to 1260C

on my previous tests I only had shiny crackled amber glass where the ashes where most concentrated. 
I know that with unwashed ashes surprises are to be expected and I also welcome them, but I would be curious to understand the possible causes 

thank you 

Valeria