Harbour ‘Slip’

So, I have a lunch box full of clay from our trip to Chichester Harbour the other weekend. I’ve got no idea what will happen to it when it is fired, it could disintigrate, flop, burn away…..explode!  It will have a high salt content, so I am hoping for something interesting.

Salt fumes have a dramatic effect on clay under heat, the sodium acts as a flux and reacts with the silica in the clay body, enhancing it’s colour.  At high temperatures, over 1280°C (2350°F), salt becomes an active vapour throughout the kiln interior.  This coats and corodes the elements in an electric kiln because a dilute form of hydrochlic acid is given off as a vaporous by-product.

I have made a couple of test pieces, which I will fire in Desmond’s gas kiln.  One simple pinch pot and one stoneware body covered with a slip made from the dug up clay……

Stoneware body, with Harbour Slip

Pinch Pot...eyes off that flapjack in the background. (not made by me....I only deal with making things out of mud!!)

Advertisements

Leave a comment

Filed under Experiments, Work in progress

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s