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Everything posted by JRW

  1. Thank you both for your input, it is reassuring. Do you know how often filters need to be replaced? Hard to find clear info on that.
  2. Hi Rew and everyone, I appreciate this thread, and I stumbled upon it because I am in the middle of my own freakout about silica dust. I have been doing pottery for 2.5 years and have been pretty blase about dust. I have done a lot of dry sanding of greenware (outside), and have worn an N95 mask for most of it. Since COVID, I learned that N95 masks do not work well for people with beards like myself, and so now I am quite concerned that all that time I was breathing in massive amounts of silica. I am having some lung irritation and phlegm production that is making me paranoid. Does
  3. Hi All, I am mixing Mason Stains into Laguna s-695 white stoneware casting slip. I find that when my pieces bisque-Fire, the colors looks vibrant and promising. But once they are fired to cone 6, the lighter greens and blues become a washed out gray or brownish color. I am not using any glaze over the raw clay, so I’m not sure what is causing the color to change so much (reds and darker blues do just fine). Any ideas? I have read that the percentage of stain in the slip might be the cause, but I’m not sure why a higher percentage would change the actual COLOR from green to gray, ve
  4. I am having the same issue - although I’m not using glaze at all. So it must be that I used too high of a percentage of the stain. It’s interesting that with stains on other parts of the color spectrum, higher concentrations yield more vivid colors - but apparently not with light greens and blues! They just turn grey
  5. I should add that I do a ton of slipcasting and I’m positive that some tiny amount of plaster must have made its way into some of my pieces, and yet I have had no issues with cracking or explosions... and yet I use a shared kiln, so I want to be careful not to put others’ work at risk.
  6. Hello, After reading many posts on the subject in this forum and others, I remain deeply confused about the dangers of a bit of plaster being present in clay during firing. Many people take it as a given that even a speck of plaster embedded in clay will cause an “explosion” or, at the very least, cracking. They say this has to do with the different properties of the plaster, which will not shrink at the same rate as the clay that surrounds it. Many other folks say that the only danger with plaster in clay is that it can lead to “lime pops” AFTER firing. They say that the plast
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