Firing slip-soaked string cast vessels

Today I fired the slip-soaked string experiments I created recently. This is the second batch of experiments using slip-soaked string, the slip being made from a bucket of mixed reclaimed clay - crank, white raku and petra. The first batch were made using slip that was far too thick and the texture of the string was hardly discernable so for this firing I was less generous with a thinner slip which made for more delicate pieces.

The kiln was fired to 1000 degrees as the bisque firing temperature, going up to 500 degrees at 100 degrees per hour, held there for 30 minutes then up to full temperature and again held there for 30 minutes.

Three of the four string pieces survived the firing intact, the largest and most fragile piece lost some of its 'tentacles' during the firing and more fell off while retrieving it from the kiln. Of the three that survived intact, the most delicate lost one appendage after being taken out - the other two (having layered string) were more sturdy and though very light have not broken.

Next step is to glaze them - I have mixed a blue-green volcanic glaze I have used previously and will try it on the test tiles (petra smooth) that were also in this firing.

So some success and some learnings too - thats why I love experimenting!