I’ve long admired the skill it takes to slip trail a design on a pot and make it look right. Not only do you have to execute an artful design and be sure of your line, it takes some coordination, being aware at all times of the exact amount of pressure you have on the bottle to control the flow of slip and have it come out in a controlled and continuous flowing line. Air bubbles in the slip bottle can be disastrous, and a clogged tip can break your flow too.
Here are just a couple of video links I came across by people who have got it down. The first is Scottish potter, Hannah McAndrew. Her work is quite lovely and in the long slipware pottery tradition of Great Britain.
And here is Minnesota’s own Paul and Denise Morris of Morris Pottery, who do wonderful slip trailed designs on wood fired pots. Denise, slip trailing here in the video, sure makes it look effortless.