Porcelain slip over a Raku clay

[JasmineIC]

Good Morning,

I am wondering if anyone has had successful experiences with coating a porcelain slip over a raku body. The vessel would then be fired to cone 010, then fired in a Raku kiln to around 600 - 700 C for feather and horse hair application.

I am trying to achive a white, smooth base for the final horsehair application, and finding that the grogged raku clay still shows through burnished Terra Sig.

I am grateful for any helpful hints as to the best way to achieve this!

Thanks for your guidance

[Min]

Instead of using a porcelain I would use some of the raku body made into a slip then sieved to get the grog out of it. (60 mesh sieve should be fine enough) Get the slip on the outside of the pot as soon as possible to avoid issues with the slip shelling off or cracking.

edit: I looked up white raku clays in Australia and a quick search brought up this one, might be worth a try if the one you are using isn't white.

Edited October 19, 2023 by Min