I have a good supply of olivine, a magnesium iron silicate also known as paridot. The Insight database calls it a refractory that melts around 2800F. Would olivine dust of about 40 mesh when added to a glaze result in green flecks?
Does anyone have any experiance with it? If not, I will post my test tile results.
Wouldn't it be great to encourage the guardians of the forum to add a glaze recipe database where one could add his or her favorite glaze recipe and allow comments on each recipe as others use the recipe, dicussing its characteristics, applications, effects of layering, pros and cons. It would be a great resource..........
Yes those letters are real. As Chris said staph is everywhere. Anywhere mold and midew grows, bacteria will be there competing for food.
Not all staph is created equal. Staph epidermatis is a normal bacteria that is on everyone's skin. It rarely causes problems and there is no reason to get rid of it unless you are headed into surgery. Most of the bacteria on our skin is protective. They compete with the bad actors like Methicillin resistant Staphalococcus aureas, knowm as MRSA. The overuse of antibacterial soaps have created the MRSA outbreaks we see today.
There have been many articles showing that playing in the dirt as a child is protective. In fact children who play in the dirt have fewer allergies as adults. One could make the arguement that potters should have a better immune system because of their clay exposure.
If someone brought samples of clay into my InstaCare I would love to do the testing. It would break my routine of colds, flues, broken bones. It could probably be written up as an interesting case study looking at what bacteria is found in ceramics and if pottery would be protective against bad bacteria like MRSA.
Although I have had a little old lady bring in over 100 jars of fecal material, so I could "examine it all." And yes Chris I did "have the nice young men in their clean white shirts come and take her away."
I have my wheel facing the wall with a mirror mounted on the wall, so I can see the shape of the piece being thrown. Consider moving the slab building table to the middle of the room so you can access it from multiple sides.
What kind of glaze would you use to maintain that crawl?
I made a glaze with a local bentonite clay. The base glaze is a nice transparent camel color. But then I added 10% rio. I layered theash glaze on top. The ash glaze absorbed some of the rio and turned a bit yellow. But it did not run and the base glaze was visible between the cracks. I'm hoping to get a better base glaze that brings out the ash glaze more.
Here is my first successful ash glaze. I call it Nuka crackle. it is fired to ^6 oxidation. It is placed on thick and cracks as it dries. The top of the tile is double dipped while the bottom is single dipped. It does not drip, but has a great matte finish.
The recipe is:
Soda Feldspar 40
Tumbleweed ash 26.7
Frit 3124 6.7
I'm thinking of using it over a darker glaze so the color is seen through the cracks.
Once you recognize the parts of the glaze, it's not so overwhelming.
2. glass makers,
I have made up flash cards with the names of the glaze compounds with their "pottery name," common name and/or chemical name, catagory #1- #5, and a brief discription to help me know its properties and function. They work for me. It may help you.
Many of us are in the same boat. The great news is that You are on your way..you are doing it.
When I was about 4 y/o, Our family went to the Yuba river in Northern CA. We kids knew we could swim because our favorite TV show was "The Aquanauts." That summer we had watched all of the episodes, so naturally we knew all about swimming. They made swimming look so easy. Unfortunantly, we had nevergotten our feet wet, much less learned to swim. I wish my mother had had a movie camera as my father dragged out of the water 4 half-drownd water-logged kids.
My point is that this forum is like The Aquanauts...One can learn all about clay. There are people here that make it look so easy. BUT, we all start at the same point...by getting our feet wet.
So, the water is warm. Welcome to the beach. It's a bit rocky at first.
I have added basalt dust to Laguna Half and half cone 5-6 clay body. In oxidation it creates a cookie and cream speckle pattern. I sieved with a 20 mesh and used about 150 gm of basalt to 1000 gm of premixed clay. You can use larger sized basalt gravel as well to obtain larger speckles.
The bowl below is Laguna half and half with 150 gm basalt dust (20 mesh) in 1000 gm premixed clay body. Clear glaze on 1/3, oatmeal glaze on 1/3 and raw clay on the rest; fired to cone 6 oxidation.
A new specie of plant called Rinora niccolifea, was recently discovered in The Philippines. It accumulates up to 18,000 ppm of nickle in its leaves. How would you like to make an ash glaze from this plant's leaves?
Ref Phytokeys 2014; 37.7136 (just published this month)
Another plant is S. America accumulates gold in its leaves. Miners look for the tree so they can process the gold-laden soil beneath. I don't remember the source of this info. Nor do I know if the plant grows in gold rich soils or if it accumulates and concentrates it; and in the process increase the gold concentration in the soil.
Who said "gold doesn't grow on tree?"
I understand this is "off-topic" a bit. But it is a new twist on "incorporating metal in ceramics."
For what it is worth...There is another active thread on the forum about dry skin caused by clay, glaze, etc. Biglou made an interesting observation. There are M.D.s on the forum, yet none have given their advise about ecczema, psoriasis, or contact dermatitis therapies as they relate to ceramics.
I am a praticing M.D. who treats these condition on a regular basis. Before I could diagnose I would need to gather a better history, view the lesions and review med usage, etc. The forum may not be the best place to do this.
BUT, It is a great place to take a history of ceramic problems, view pictures of the problem areas, review glaze usage and application, and diagnose/discuss remedies to the problems.
I appeciate and thank the "Clay Doctors" of this forum for sharing wthout restraint.