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Joseph F

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About Joseph F

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    Always Experimenting
  • Birthday 08/12/1984

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    : Atlanta, Georgia

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  1. Ian Currie Test Tiles Forums?

    hahaha. I can imagine doing that. I now think of everything in terms of volume + dry mixing. Now that I have the ability to calculate a ratio of wet to dry in a mix. I can easily estimate the dry amount needed to add. It is fantastic what a little work will lead you to discover improvements in your processes. When I used to mix glazes for testing colorants. I would weigh out 5 batches individually.... now I just mix up a batch, and do a certain ml into each one, calculate the dry ingredients in that cup and mix the appropriate % I want to add. So much better. I am really enjoying the exploration aspect. I recently decided to give up any real pursuit of being a production potter in order to be a glaze and surface scientist potter profession thingy?! I am actually studying chemistry makeups of ingredients now in my Out of Earth Into Fire book. That isn't to say I don't think production pottery isn't awesome, it is. It just isn't where my heart is in this world of ceramics. I was talking to a friend about his business and stuff and I was telling him to quit beating his head against the wall trying to force something that he doesn't want to do, and just adapt to what he wants to do. Then on the way home I realized that I am not even taking my own advice. The whole idea of electric kilns and what they can do is still in its infancy. They are beautiful machines that produce consistent glaze results, it is up to us to figure out the rest of the glaze equations. My slab roller should arrive this coming week I think. I estimate I will be making hundreds of tiles very soon. Lots of testing!
  2. I made the plunge and bought a shimpo banding wheel. I must say it turns rather nice. Looking forward to trimming some yunomi on it with my wooden knife.
  3. Ian Currie Test Tiles Forums?

    I am practically good friends with the hatter.
  4. NCECA

    This is why I shave my beard. I don't want to give anyone any false impressions. I keep it close and stubble, to represent my rookie ness.
  5. Ian Currie Test Tiles Forums?

    @Min I read through his document several times. Lots of really good information. That last sentence you pasted: "I found that as the silicon carbide size became smaller, there was more glaze melt, less surface texture from the glaze bubbling while giving off oxygen during the chemical processes and weaker reduction." I think this has a lot of merit to look into. I am curious if I can increase the SiC amounts greatly since the surface is suffering from less bubbling from the finer meshes of SiC. I wonder if you can increase it and still have a smoother surface but start to get the same reduction effects. Eventually I will test this. Maybe in the coming weeks. Particularly around the perfect Silica and Alumina ratios that seem to promote the reduction but not the surface bubbles. For the others: Is there a general interest for me to continue posting these SiC grids? I am going to be running a bunch of them along side normal grid test every few weeks. I will start posting the higher resolution pictures in the future however. If people feel like I am just posting useless information by posting my grids I will stop linking them. I find them interesting, but maybe this isn't the place to continue to link them? I am also going to adapt my grid this week as well to have more information in the cells, some type of vertical change. Also they will be more uniform thanks to my new slab roller coming.
  6. Ian Currie Test Tiles Forums?

    I totally agree on this point. I know iron is a flux in reduction, but I am not sure that this is the case with copper. I have never read that anywhere, but I don't fire reduction so again I could be wrong. But it doesn't account for the crazing improving slightly as more SiC is added. That would be opposite factor I would assume?
  7. I fired some wadding in my electric kiln a few months ago. I did about 6 pots. I made the wadding up right before the firing and added it to the pots. I just added a 1 hour preheat and fired away. There were no signs of cracks or explosions. Everything came out fine. I just mixed Kaolin and Alumina Hydrate together 50/50. Seemed to work fine. No idea if this is helpful to you or not, but just some experience from my end.
  8. We stopped eating gluten, as it was tearing our stomachs up and making me and my wife ache. We didn't realize it but over the last 30 years we have developed a sensitivity to gluten. We have cut it out completely and feel much better. It is hard to do. I agree the apples look better with the pie crust deliciousness, but there is no way I could eat that now. I might make an apple baker. It looks interesting to throw and we love apples. Yum. I had forgot about this post. I need to throw the bowls and cut them in half too.
  9. Ian Currie Test Tiles Forums?

    I posted here on accident. Sorry. I would delete it but I can't.
  10. Ian Currie Test Tiles Forums?

    @curt I agree with most of that, with some exceptions: - The picture might not show it but there is little red specks in each of the high flux tiles, that said they are nothing like the red appearing in the right corner as you said. I personally like the red dots on the crazed surface. I actually have plans to use that as it is such a rare thing to see, a blueish green glaze with red specks. Very pretty. - I thought SiC was refractory. It would require some good flow test to actually prove that it is "fluxing" the glaze. I might be up for that eventually but I have some other plans to work on. That being said I don't really understand either how the surfaces are better on the SiC tile. I also did .4 and .8 SiC as well I just didn't post them. They have the same increasing properties. As SiC increases between the tiles the cells get smoother and smoother. The red from the oxygen theft isn't that much more apparent when increasing the SiC by 100% each time. It would be interesting to preform a flow test with something like 0% SiC 1% 2% 3% 4% just to see if in fact it is refractory at some point but some other chemical process is happening that is causing the glaze to "flow" or "glass" better. The smoothing of the cells definitely happens as I increase SiC. Looking at tiles .4, .8 and 1.2 you can literally see the smoothing effect happening when looking at all three in order. I will attach .4 and .8 below. - The pictures don't show it well, but the crazing is slightly decreasing in the SiC tiles, as would be expected as you are increasing the ratio of silica to flux. (I will try to add a better picture that shows the crazing.) I will start posting pictures hosted via my webserver instead of the upload in the future, because it is hard to make assumptions like the ones we have made with crappy resolution pictures. Sorry about that. My theory is that the smoothness comes from the Silica in the SiC. I think it is balancing the alumina and silica ratios ever so slightly so that the glaze is more stable. But this is just a theory. All the right hand rows, even though some are smoother look underfired to me. The reason I believe this is because the only corner that doesn't seem to care about the SiC is corner D, and the tiles around it. It looks pretty much the same from every tile. Crazing Picture: I cropped the close up pictures. As you can see the SiC is actually reducing the crazing, which makes sense considering it is comprized of mostly silica right? I hosted this one on my webserver so you can click it a few times to get to the actual source and see it in higher res.
  11. Ian Currie Test Tiles Forums?

    I broke it in half on the tile I was talking about earlier. It definitely has places that look like bubbles. I don't have a microscope camera so the picture is pointless, but when I hold up a magnifying glass to it, it has bubbles below the surface. But still, do I care about those bubbles? I mean the surface is still smooth isn't that the goal for the work? Although I could care less about those tiles on the right hand side. The best tiles are 16,17 and 21. I am actually going to develop those glazes further I think and add more SiC. I think it could handle upwards of 2-3% SiC cause at 1.2 it shows 0 signs of bubbling and very little red dotting. But this is going to be for a later time. I have another glaze I am about to spend a few months documenting thoroughly.
  12. Ian Currie Test Tiles Forums?

    I will break it in half there and post a picture when I get home... But still its interesting that sic reduced the surface bubbles for some reason.
  13. Just installed my insulation in the garage door again for the winter. I took it down for some reason I don't remember but its back up now. Also got that slab roller ordered and some slab mats. Lots of tiles to be made in my future and some really good ideas as well.

    1. Denice


      Do you have a furnace in your garage.  My husbands garage has a small gas one that drops down from the ceiling,  I think they cost around $ 500.  It warms up the garage in minutes and is very inexpensive to run.  If you run across any questions about tile,  just ask I made them for 10 years.  Denice

    2. Joseph F

      Joseph F

      Thanks for the information Denice. I have a small heater, it is just an electric one. I find once I open the garage door to my house the heat from the house flows into that room, and I turn on the heater and about 30 minutes later it is plenty bearable. Without the garage door insulation though it is not fun to be in there. 

      As for the tile, I am just going to be making grid tiles and test tiles with the slab roller. I just need them to be uniform for documentation purposes. But if I have any questions I will definitely direct them to you. Thanks for that.

  14. Table Top Slab Roller

    I wish I could go to the NCECA. still not this year. Maybe the next. Of course I have been saying that for the last 3 years. One DAY! Until then I need a slab roller. They don't appear to make the 18'' tabled version anymore, or I can't find it at least. The smallest table version they have now is a 24'' one. I have no need for one that big. So I think I will end up with the table top version. It makes the most sense I think for what I need it for. Thanks for your helps peoples. I appreciate it.