Jump to content

cmayse

Members
 View Profile  See their activity

  • Content Count

    7

  • Joined

  • Last visited

  1. cmayse
    It does become slightly more liquid when I stir. Not quite liquid enough. But it gels again within a literal couple minutes.
  2. cmayse
    Tried fresh Darvan and that didn’t work
  3. cmayse
    Wow. I just read it has a two year shelf life. I’m going to feel pretty dopey if that has been my issue this whole time haha. Thanks for the advice
  4. cmayse
    It’s shot? Does darvan expire!?
  5. cmayse started following Trouble shooting cone 6 porcelain casting slip
  6. cmayse
    Hi all, Second time posting here and I’m hoping you can help! Hopefully this is the right place to be for a troubleshooting question like this. Im currently working from a recipe for Val Cushing’s Cone 6 Porcelain Slip. grolleg: 15% tile 6: 15% Epk: 3% om4: 10% flint: 25% neph sy: 30% gerstley borate: 2% —————————— Sodium silicate: .0028% calgon: .0005% When I mixed this before, as now, I subbed the deflocculants with Darvan. I mixed it successfully then, but I’m currently have difficulty. I know that darvan generally subs for sodium silicate at 2-1, so bearing that in mind, that’s where I started. I kept adding darvan in small 5g increments up to 100g in a 10000g recipe. That seems like far too much, but maybe I’m wrong? I feel like I’m on the other side of that deflocculation bell curve some how and missed my mark. Every time I come back to the studio the slip is gelled thick but never settled and never develops a skin. When I’ve added more darvan, the slip temporarily thins, but seems to rebound to being too thick the next day. Can the casting process indicate overdeflocculation? If so, in what ways? What should I be looking out for other than settling and a skin in my bucket? Can anyone offer any advice on this recipe or deflocculants? I’ve been doing some hard research and testing and can’t nail it down. My current gravity is measuring at 1.71, so I’m hesitant to add more water, since according to some other online sources I should be aiming between 1.7 and 1.8. I’m wondering if I should throw caution to the wind and say “this slip just needs more water than most”. Ive mixed this slip before with great success two years ago. I have no clue what I did right then. Dumb luck haha. Any suggestions or advice would be greatly appreciated. Thanks!
  7. cmayse
    That's what I thought, but after a bisque it's still pretty gray. Will it darken more if I test it to ^10?
  8.    cmayse reacted to a post in a topic: Mason Vs. Ferro Stains
  9. cmayse
    I'm using mason stain for the first time to create a black slip. Currently I'm at 5% with 6600 black Mason stain, and my casting body is barely gray after testing. I'm doubtful that another 5% will do the trick. A friend recently suggested that Ferro stains have a higher saturation, that they seem to be more concentrated, and that a person generally has to use less for the desired result. Does anyone know if there's any truth to this? And what stains do you prefer and why?
×
×
  • Create New...

Important Information

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

  I accept