ababy sharon on mon 16 aug 99
Hi!
In those days it is too hot to be in the studio in the afternoon (35C
without the assist of the kiln) So this is the time to learn and 'play' with
glazes.
I found in CM: 9/1980 a letter by Bob Hay from New South
Wales dealing with a local material from India called Kanch the way he
found in A book named"Pottery in India" by Gurcharan Singh, from 1979. In
those
day when we use glaze programs,it is pretty easy to make those glazes
according to Hay`s analysis:
KANCH
SiO2 59.37
TiO2 .27
P2O5 1.65
Al2O3 8.41
B2O3 .39
Fe2O3 1.71
MgO .73
Na2O 23.5
CaO 1.93
K2O 2.04
Hay offers to prepare it this way:
Bone Ash......................1.04%
Frit3110.....................13.11
Soda ash.....................33.5
Talc..............................0.13
Kaolin........................17.46
Flint...........................34.76
Add
Red iron oxide..............1.49
Titanium oxide...........0.23 "Mix with cold water immediately before use"
Here are some recipes:
Cone08-06 (This is the right cone to try both oxidation&Raku)
Delhi Blue Glaze:
Borax......................24
Kanch......................71
Kaolin.......................5
Add copper ox...........5
Indigo Glaze:
Borax......................20
Kanch.....................75
Kaolin......................5
Add Cobalt Stain.....3%
Brown glaze
Borax..................21
Kanch.................79
add Zinc oxide....5
Iron oxide ....8%
When you live in India it is a local material if you don`t it is
'exotic'...the same about Cornwall Stone and Mount Saint Helen`s ash.
Ababi
Jan McQueary on tue 17 aug 99
Hey, just bought a terrific book called "Pottery and the Legacy of Sardar
Gurcharan Singh" (ISBN 81-900931-0-X), pub 1998 by Delhi Blue Pottery
Trust, from a friend who studied at his pottery when she was in India.
Hardback, 200+ pages, full of color pictures, forward by David Leach. Mr
Singh pioneered the concept of "studio pottery" in India, and trained
several generations of potters. His son Mansimran Singh trained under
Bernard Leach and Geoffrey Whiting, and continues to run his own pottery.
Examples of traditional and contemporary work (low fire and stoneware),
dinnerware, tiles, jalis (permanent, pierced screens for windows, made of
individual clay elements), some recipes.
The book cost about 70 dollars, and benefits the Delhi Blue Pottery
Trust, which promotes pottery related activities in India and
internationally.
My friend had a number of copies Mansimran sent over for her to sell.
She may have some left. She lives in Northern Virginia. If anyone wants
more information, send me your phone # or address and I will pass them on
to my her.
Or contact:
Delhi Blue Pottery Trust
Delhi Blue Apartments
Safdarjung Ring Road
New Delhi - 110 029
India
In the book, Kanch is described as being made from "the efflorescence
thrown out be large tracts of arid land in the autumn months after the
rainy season. This is collected and heated in large furnaces; the melt
forms glass, or kanch." It's been used since the 13th century. Glazes
may additionally be fluxed with borax and/or lead. The analysis is
pretty much the same as the one you found in CM.
Thanks for the Kanch substitute recipe. I'll definitely look up the
Ceramics Monthly article you mentioned!
Jan McQueary
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Veena Raghavan on wed 18 aug 99
Delhi Blue is a really beautiful color and was used by the Moguls in many
of the building in Delhi. Sardar Gurcharan Singh researched and developed a
blue that closely resembles it. Hence the name of his pottery, which he ran
for many years.
My parents were close friends of Sardar Gurcharan Singh, and he is
the one who encouraged me to try my hand at pottery many years ago. At the
time, I was a painter and sculptor, and he held an exhibition of my work in
these fields, but wanted me to begin pottery, which I did. Soon after, I
left Delhi, but I have always considered Gurcharan Singh my pottery guru
and the one who inspired me to get into this field. He was a great potter
and a wonderful person.
Jan,
If you do manage to dig up the article in CM (my issues do not go
that far back), could I possibly ask you to make me a copy. I would, of
course send you a stamped addressed envelope for mailing it to me. I would
really appreciate it.
Veena Raghavan
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