Chic & Keith on sat 29 jul 06
On Jul 27, 2006, at 8:17 AM, mariannekmilks@aim.com wrote:
>
> My first question still remains: I want to bake a cookie no-one has
> invented.......
> If I would want to make my own unique glaze, which ingredients/group
> do you suggest would be a "must"?
Marianne,
First question is always - what kind of unique glaze surface do you want?
Glossy? Matt? Semimatt? Lizard? Crawling? Any special color?.....a solid
or mottled or verigated? Your answers determine some of the ingredients.
Here is my list for things that are a glaze "must."
1. A glaze core - forms the "core" of the glaze, influences the whole glaze
Mimi Obsteler lists glaze cores as those ingredients
that already include glassformer + stabilizer + flux
Includes: The feldspathic family: Feldspars, Neph Sye, Cornwallstone
Spodumene, Petalite,
Lepidolite
Frits
Borate minerals: Colemanite, Gerstley Borate, etc.
Ash: Volcanic and Rice Ash, possibly some wood ashes
unique effects: Ash, anything with Boron, the ones with lithia like
petalite, spodumene can do strange things.
2. Pick a flux - the amount of flux influences glaze surface
each flux affects color a little differently
Interesting effects: my favorite for matt is anything with MgO
- high amounts = tiny matte crystals with a slow
cool
- does interesting overlaps with a glossy glaze
- can produce purple: MgO + Cobalt
- extremely high amounts go lizard
I like to play with with Bone Ash too - for a sea foam effect
3. Pick a clay: The amount influences glaze surface
large amounts can mute colors
helps keep the glaze afloat
Interesting effects: secondary clays that have some impurities
try digging some of your own
4. Silica: the amount affects glaze surface,
stable glaze? be sure to have enough but not too much silica.
stable doesn't matter to you? low silica can do some fun stuff.
5. Opacifiers: Titanium dioxide (also in rutile) breaks up the color
Bone ash here too - opacifiers by tiny bubbles.
6. Crystallizers: Zinc and titanium "seed" crystals if you like that kind
7. Colorants: Rutile ...plays with all the other colors.
8. Once you find a glaze you like, try brushes strokes of a mix
of rutile + red iron + water. You can get some exciting reactions!
And remember: the ratios of the oxides determines what happens.
Hope this is what you were looking for.
Chic Lotz
Grass Valley, CA
marianne kuiper milks on sun 30 jul 06
Goodmorning Chic,
You wrote "Hope this is what you're looking for".
Well, yes and no, and I really appreciate the information you gave me. More to think about.
I need something far more simple. I still feel like a newbie, in part (error?) because I am trying to learn so many things at once.
You gave me too much information. You gave me a fine NY City restaurant (sorry, San Francisco) with rows of fridges, boxes, liquids, meats,seafood, knives, ovens and spices and-particularly- to me foreign items that either look/smell good or horrible.. I am a decent cook and can put on an impressive meal, but I would be lost there. Worse yet if I had to bake a dessert from scratch.
What I need (and Hank & Wayne really helped mostcwith that) is be limited to groups, (vegetable, starch, protein, condiments, spices/herbs, color to spruce it up)
From meat, Marianne, today you take chicken. And think of something south American. Add a starch - start with rice. For vegetables...etc, etc.
I understand the basic groups (finally), but too many choices (you mentioned two things I've not really heard of) confuse the heck out of me. I'm pretty smart, but many of these things have come to me backward. Glaze calc? I'm good at it. No problem. it's logical and organized. Yet I cannot put 2 and 2 to gether when it comes to making a glaze base, by logic, on my own., it always adds up to 1.3 or 16 :-)
I think-no, I know,- that I am still missing a connection somewhere, which is why I am so thankful for your response. it will be printed off and hung on the wall with the others. Perhaps I am trying too hard. I will most likely end up using other artist's great recipes in the long run. Why re-invent the wheel? I just want to know how the wheel works. Figure it out. Because that's how I am.
Truly thank you, Marianne in PA. Still hot.
Chic & Keith wrote: On Jul 27, 2006, at 8:17 AM, mariannekmilks@aim.com wrote:
>
> My first question still remains: I want to bake a cookie no-one has
> invented.......
> If I would want to make my own unique glaze, which ingredients/group
> do you suggest would be a "must"?
Marianne,
First question is always - what kind of unique glaze surface do you want?
Glossy? Matt? Semimatt? Lizard? Crawling? Any special color?.....a solid
or mottled or verigated? Your answers determine some of the ingredients.
Here is my list for things that are a glaze "must."
1. A glaze core - forms the "core" of the glaze, influences the whole glaze
Mimi Obsteler lists glaze cores as those ingredients
that already include glassformer + stabilizer + flux
Includes: The feldspathic family: Feldspars, Neph Sye, Cornwallstone
Spodumene, Petalite,
Lepidolite
Frits
Borate minerals: Colemanite, Gerstley Borate, etc.
Ash: Volcanic and Rice Ash, possibly some wood ashes
unique effects: Ash, anything with Boron, the ones with lithia like
petalite, spodumene can do strange things.
2. Pick a flux - the amount of flux influences glaze surface
each flux affects color a little differently
Interesting effects: my favorite for matt is anything with MgO
- high amounts = tiny matte crystals with a slow
cool
- does interesting overlaps with a glossy glaze
- can produce purple: MgO + Cobalt
- extremely high amounts go lizard
I like to play with with Bone Ash too - for a sea foam effect
3. Pick a clay: The amount influences glaze surface
large amounts can mute colors
helps keep the glaze afloat
Interesting effects: secondary clays that have some impurities
try digging some of your own
4. Silica: the amount affects glaze surface,
stable glaze? be sure to have enough but not too much silica.
stable doesn't matter to you? low silica can do some fun stuff.
5. Opacifiers: Titanium dioxide (also in rutile) breaks up the color
Bone ash here too - opacifiers by tiny bubbles.
6. Crystallizers: Zinc and titanium "seed" crystals if you like that kind
7. Colorants: Rutile ...plays with all the other colors.
8. Once you find a glaze you like, try brushes strokes of a mix
of rutile + red iron + water. You can get some exciting reactions!
And remember: the ratios of the oxides determines what happens.
Hope this is what you were looking for.
Chic Lotz
Grass Valley, CA
______________________________________________________________________________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
---------------------------------
Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1¢/min.
| |
|
