David Hewitt on fri 2 jul 99
I have recently had to buy some more Nickel oxide. Up to now it has
always been black in colour. The latest supply is an earth colour,
something like milk chocolate.
Hamer talks of two differently coloured forms of NiO2, black and
greenish grey. He says both forms are 99% pure nickel oxide and that the
trace elements making up the 1% influence the colour of the nickel oxide
powder but do not make any difference to the use of the material as a
glaze colourant.
I would appreciate hearing of other potters experience. Would you expect
the 'milk chocolate' coloured nickel oxide to have a different colouring
effect to the black nickel oxide?
The glaze that I use with nickel oxide only contains 1%.
David
--
David Hewitt
David Hewitt Pottery ,
7 Fairfield Road, Caerleon, Newport,
South Wales, NP18 3DQ, UK. Tel:- +44 (0) 1633 420647
FAX:- +44 (0) 870 1617274
Own Web site http://www.dhpot.demon.co.uk
IMC Web site http://digitalfire.com/education/people/hewitt.htm
Iveragh Ceramics on sun 4 jul 99
Dear David,
Seems like it could be rutile you have been given.I
suggest you make up a small test batch of your original receipe and use this
material as the nickel,you will easily know from your result whether or not
it is nickle.
Regards, Bob Hollis
----- Original Message -----
From: David Hewitt
To:
Sent: 02 July 1999 21:13
Subject: Different colour Nickel oxide
> ----------------------------Original message----------------------------
> I have recently had to buy some more Nickel oxide. Up to now it has
> always been black in colour. The latest supply is an earth colour,
> something like milk chocolate.
> Hamer talks of two differently coloured forms of NiO2, black and
> greenish grey. He says both forms are 99% pure nickel oxide and that the
> trace elements making up the 1% influence the colour of the nickel oxide
> powder but do not make any difference to the use of the material as a
> glaze colourant.
> I would appreciate hearing of other potters experience. Would you expect
> the 'milk chocolate' coloured nickel oxide to have a different colouring
> effect to the black nickel oxide?
> The glaze that I use with nickel oxide only contains 1%.
> David
> --
> David Hewitt
> David Hewitt Pottery ,
> 7 Fairfield Road, Caerleon, Newport,
> South Wales, NP18 3DQ, UK. Tel:- +44 (0) 1633 420647
> FAX:- +44 (0) 870 1617274
> Own Web site http://www.dhpot.demon.co.uk
> IMC Web site http://digitalfire.com/education/people/hewitt.htm
>
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