John Sankey on sat 10 nov 07
All of Alisa's tests are now in, and I'm starting on the others.
Over 1000 posts have 'glaze test' in the subject!
And, that raises a question: should glazes that don't work be in
the database? I know we all learn from failures, but given the
overwhelming number of successful glazes out there, should I
restrict the database to those that at least one person has had
success with? That would make it a lot easier to use.
--
Include 'Byrd' in the subject line of your reply
to get through my spam filter.
Pfeiffer Fire Arts on sat 10 nov 07
The problem may be what is a failure? It may not be what I need or intended
but someone else on their clay may like it.
Dan & Laurel
www.pfeifferfirearts.com
>>>>And, that raises a question: should glazes that don't work be in
the database>>>
Dan Semler on sat 10 nov 07
Hi John,
If your intent is to have a db that you can mine for data on
various types of glazes then yes I would say include the failures. Add
a field that denotes them as such, default searches to exclude them,
and add an option to include them in searches. But, I would not
prioritize getting the failed glazes in over the successful ones...
Thx
D
Alisa Clausen on sun 11 nov 07
Hi John
All of my tests are made with materials local to Denmark. However, the
majority of the recipes are from North America. The ones that failed me
may be due to a different frit or Gerstely Borate that was subbed with one
of my local materials. With the original ingredients, it may have been
different. My aim for my testing from the start was to work out a good
palet of recipes from my old US recipes, subbing with my new country's
local materials.
I think it is just as important to include the glaze recipes/formulas for
the ones that were successful as not. I have some glazes, such as Paul
Lewings Sana Green, that has never, ever worked for me. I want it to, I
have tested it at least 6 times, but it is horrible for me. It obviously
is a good glaze for Paul and others. On the other hand, I find my Frit
witha wee bit Barium, gives me great results as gram for gram sub. for
Gerstely Borate.
No none can guarentee a good result and that is why we breath in and out:
Test your glazes! I think comments about expansion and stability are are
equally as important as one's own personal test tiles. I cannot run
reicpes through GlazeMaster with a result of what Should work, and count
on it before I make the physical tests. With glaze calculation, I can
also see inside the test tile and evaluate if some changes are needed
I start with a recipe, test it, evaluate the result and either don't fix
anything if I think it is all right, or if not, but I like something about
it, start to work with the formula to get it right for my own personal use.
With this said, I have been more and more selective with my testing when I
read recipes. There are billions of them and that is whay I filter out
the ones which I think are not worthwhile, due to their high contents of
materials that are either toxic or seldom used anymore in cone 6 glazes.
Losers and winners can sometimes trade places in different kilns.
Best regards from Alisa in Denmark
Winter, dark and getting all Christmasy.
| |
|
