Pouring is a way of putting a glaze or slip on to pottery. It is the method used to cover a piece of clay or bisque by tipping the liquid over the piece prepared. Here it explains how to use it with jars and bowls and tiles are in the section GLAZE-BASE (e) Applying by pouring on to tiles.
There are other methods that can be used; Dipping, Glaze-base (g) Applying by dipping plates, jar and lids and Brushing. Both the two sections on Glaze-Bases can be used for colors and slips.
1) For a bowl and a jug, do the inside first. a) Hold it over a basin, pour some glaze into it, tip it sideways and turn it until the glaze covers the inside wall, b) then tip out the remaining glaze.
2) For the outside of a bowl, c) put a basin on top of a banding wheel, make a bridge with two bars of wood and put what is being decorated, on top, upside down and pour the liquid over it, from the top letting it run down, turn the wheel doing the same until it is finished. This cannot be used for work that curves inwards, dipping is better.
3) For a plate, d) hold it the right way up over the bucket where the liquid is kept and with a large spoon put 2 or 3 spoonful’s in to the center of the plat. Now carful tilt the plate so the liquid covers it, move it so it cover several times, then tilt off the un needed glaze back into the bucket. Clean the edge.
This video shows you exactly what to do, it is in two sections, you have to see them both and this is the second How to a make a Mermaid Plate
4) Do the same for the back as with the bowl.
Note: Pouring is also the process of filling a plaster mold with casting slip (liquid clay) to create a clay object. Once the plaster mold is removed, the clay object is known as greenware or unfired clay.