Jump to content

Linnea56

Members
  • Posts

    17
  • Joined

  • Last visited

Profile Information

  • Location
    Chicago

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

Linnea56's Achievements

Member

Member (2/3)

5

Reputation

  1. I went to class last night with my slip trailing kit and a piece to practice on, and all my questions for a different instructor. He said deflocculants were only used by people who did a lot. But I had no end of trouble. It jammed, it spit. Made blobs. In 3 hours of class time, I had a piece finished, but not one I'm happy with. It's more than just needing practice, because pieces I did a few years back are nice and fluid. I was an illustrator, so I have a steady hand. There was either still grit left behind, or that deflocculant IS really necessary. Once I buy some - Can't I just add it to already sieved slip? I don't understand why I need to dry clay first.
  2. I used a funnel into the little bottles I bought. If you have the bulb type, squeeze the bulb to push out air. Insert neck under the surface of the slip. Release pressure slowly, and the slip will get sucked into the bulb.
  3. I’m interested in doing more. I had an instructor who could help me, but he’s since left the studio where I take classes, and none of the current instructors do it and can troubleshoot for me. The studio DOES still have the slip trailing and decorating slip, though, in both white stoneware (screened to remove grog) and in Porcelain. For the most part, I’ll be doing it on top of white stoneware from Standard, which has some grog in it. 13% shrinkage rate. I was watching a video of a noted potter who does a lot of it, and bought a henna application kit that she recommended, that came with 16 different tips. (The Xiem kit that the studio had seemed to be perpetually clogged or dirty, so I figured I’d better buy my own.) I imagine most of them I can’t use for slip trailing, but some of them look like the ones that came in the studio Xiem kit. She also mentioned using a deflocculant to get a smoother flow. Looking at the local pottery place website, they list Darvan # 811 and Sodium Silicate. Question 1: Which deflocculant is better for slip trailing? I know that Sodium Silicate has other decorating uses, like that surface crackle effect; but that has not been done at this studio since that first instructor left. How do you know how much deflocculant to add? Someone told me also that it goes bad quickly. Do deflocculants have any other uses? Question 2: If I do porcelain slip trailing on top of white stoneware, do I need to worry about different shrinkage rates? Or should I stick with using white stoneware slip on top of white stoneware? The studio white stoneware is more of a creamy color rather than white, so I thought the porcelain might show up better under a glaze. They are all within one % point of each other. I don’t know the porcelain # offhand, but I can find out. I also use Standard 266 Dark Brown, shrinkage rate 12.5%, which I’m testing applying porcelain slip onto in layers with a brush, then smoothing with a rib, to get certain glaze colors to (hopefully) work out better. I’ve tried white stoneware slip on this, but I’m finding it harder to get it smooth. Maybe deflocculant is something I should add to the slip for this use as well. Thanks for your help!
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.