This week I have been creating samples of my clays, I have made 5 clays altogether and have mixed several colours together making several marbled and several fully mixed samples. This is a table of the clay tests I have done so far, once they have been fired I will take a picture and produce a new table to say what colour has been produced.
Coloured Clays
|
Expected Colour
|
Colour Test
|
Marbled Samples
(Mix 1)
|
Fully Mixed Sample
(Mix 2)
|
Rutile and Red Iron Oxide
|
Brick Red
|
Rutile and Red Iron Oxide
|
Rutile and Red Iron Oxide and Yellow Iron Oxide
|
Yes
|
Yellow Iron Oxide
|
Yellow
|
Yellow Iron Oxide
|
Rutile and Red Iron Oxide and Iron Oxide
|
Yes
|
Yellow Ochre and Black Iron Oxide
|
Black Yellow
|
Yellow Ochre and Black Iron Oxide
|
Yellow Iron Oxide and Iron Oxide
|
Yes
|
Manganese Dioxide
|
Dark Brown
|
Manganese Dioxide
(Reduction)
|
Yellow Ochre and Black Iron Oxide and Yellow Iron Oxide
|
Yes
|
Iron Oxide
|
Light Brown/Purple
|
Manganese Dioxide
(Oxidation)
|
Yellow Iron Oxide and Manganese Dioxide
|
Yes
|
Iron Oxide
(Reduction)
|
Manganese Dioxide and Iron Oxide
|
Yes
| ||
Iron Oxide
(Oxidation)
|
Rutile and Red Iron Oxide and Manganese Dioxide
| |||
Yellow Iron Oxide and Iron Oxide and Rutile and Red Iron Oxide
|
To produce the marbled effect with the clays, I firstly rolled two clays into a long sausage shape and twisted the around each other into a marshmallow like shape and twisted it into a spiral and rolled it, this made Mix 1 in my table. Mix 2 is a full mix of two colours rolling and kneading the clay until no individual colour could be seen.
