KayleighpP

No I did mean 1120°c - when I was taught ceramics at University it was always to high bisque Earthenware and low bisque Stoneware.

Yes they were left for several weeks as this is done by an artist and they get them delivered to my studio for firing.

I have since found out that the transfers should be fired to 780°C for Earthenware, these were originally fired to 820°C, 180°C degrees ramp per hour as suggested by the Bailey's Decals company. However, on further research that firing program is suitable for China not Earthenware. I am hopeful that an adjustment in the firing program will resolve this issue. The bisque firing was 1120°C, and glaze 1100°C. There were three vases in the kiln and the one in the photo was most affected, the other two had a smaller amount only on the outside of them. They were side by side on the same shelf. Kiln was cleaned thoroughly before firing so not debris as far as I can see, as definitely looks like little blister/ pinholes.

Hi Min There are various decals from Bailey's Decals and Heraldic (possibly other companies), these are from the other artist's collection she doesn't have much information on them which is overly unhelpful, and has had them for some time. I have been able to successfully fire them on to ready-made china, however once onto vases made by me I am having this pin holing issue. Due to the nature of the design they are complex, however the other artist I'm collaborating with has had success with this method with a previous ceramicist, but I unfortunately can't get the information from that ceramicist. I am just in the dark on how they've managed to achieve it. I've attached a photo of the inside of the worse one and a close up of the outside as it's hard to see in a zoomed out photo. It has a raised gritty affect but if rubbed with wet and dry you can see the holes. Hope that all makes sense.

I’m currently working on a project where we are making vases in Earthenware, (CWE from Valentines Clays), using coloured slip made from the clay body, and a commercial transparent glaze. Then we are using quite a few different enamel transfers from different companies layered up. Now we’ve had the first vases out the kiln and one has significant pin holes/(spit out?) all over it inside and out, the other two have slightly less but do have it on them. Does anyone have experience of this and know how to solve it?