Slip testing

This week I've been experimenting with Slip Testing.

To create a standard ceramic slip I blend up some of the same clay body the slip is going to be applied to with lots of added water to a thick creamy consistency; which then gets sieved.

*Another way to create slip is to dry out clay then add water to turn it into a liquid.

 I measure out the slip into litre's (1000ml)then add the percentage of coloured stain / oxide to the slip. This particular clay is a sandy coloured buff stoneware, to get a strong colour I add 10% to the slip. 

You can use less stain to achieve lighter colours, the percentage you use depends on the clay body you're applying it to and the finish you wish to achieve. If your using oxides, they are much stronger than stains so the percentage is likely to be less.

As you can see I have done 2 tiles of each colour, this is because I shall glaze 1 tile of each colour so I have reference to the colour without glaze. When you apply glaze it enhances the slip's colour and it becomes much brighter. The colour difference would be from a pastel shade to a bright strong colour.

 The remains of the tiles I made are left on the fabric, I love seeing this as it reminds me of the tiling that can be created with the pieces I've cut out.

Which do you prefer to add colour to your slips, oxides or stains?