CraftWEB Hot Glass Talk  

Go Back   CraftWEB Hot Glass Talk > Hot Glass > General Hot Glass Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 12-21-2017, 07:53 PM
Dave Bross Dave Bross is offline
Registered User
 
Join Date: Apr 2002
Location: Archer FL(near Gainesville)
Posts: 2,948
Dave Bross is on a distinguished road
Detailed Info on Slip Casting Glass Pots

What we have here is an old pamphlet from NIST on how they slip cast pots for optical glass circa early 1900s up to the 1940s. TONS of good info in this and you can download it in your choice of format. It's public domain so no worries on violating copyright.

Of course, pots made this way aren't nearly as good as what you can buy today.

I think this is valuable for making your own assay type pots for inexpensive experiments and the like. A bit of lithium spar added to these old recipe percentages should get you something like an assay pot that you can whack up to heat and back down again with not much delay. This assumes small pots.

The actual and shipping costs of assay pots are way up there these days so the ability to make them up under the shade tree strikes me as a good thing. OK, enough blather, here's the link:

https://archive.org/details/circularofbureau452hein
__________________
Art is not a thing...it's a way.
Reply With Quote
  #2  
Old 12-22-2017, 07:57 AM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 20,503
Pete VanderLaan is on a distinguished road
I used to slip cast my own pots around 1976 using two meshes of kyanite and tenn ball clay with some sodium silicate as a deflocculent. Initially a friend threw a pot for me and we took a thick plaster off of it and poured the pots.
They turned out to be one shot deals but as long as you kept the furnace on, they continued to perform well. Then, something happened which made me abandon the process. Anytime a new pot was stored (after having been bisqued) for more than about two months, it began to leach these incredible beautiful stones which looked like lace. They were not to be gotten rid of.

I could go into gory detail but I stopped after herculean efforts to solve the problem.
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #3  
Old 12-22-2017, 02:39 PM
Jordan Kube Jordan Kube is offline
?
 
Join Date: Aug 2003
Location: Seattle, WA
Posts: 1,633
Jordan Kube is on a distinguished road
Very cool Dave, thanks
__________________
WWUD? Think for yourself.
Reply With Quote
  #4  
Old 12-23-2017, 10:47 AM
Dave Bross Dave Bross is offline
Registered User
 
Join Date: Apr 2002
Location: Archer FL(near Gainesville)
Posts: 2,948
Dave Bross is on a distinguished road
I can't remember where I read it now, but the lace Pete describes is supposedly gotten rid of by a tiny amount of barium in the clay.
__________________
Art is not a thing...it's a way.
Reply With Quote
  #5  
Old 12-23-2017, 01:12 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 20,503
Pete VanderLaan is on a distinguished road
I think it was the pot coming apart gracefully.
__________________
Where are we going and why am I in this basket?
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 12:34 PM.


All published comments within these message boards are the opinions of its contributor and does not represent
the opinion(s) of the owner(s) of this website. Please see the Terms of Use file for more details.

Books to Help Artists Avoid Online Scams: Top 10 Email Scams | Social Media Scams

Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
CraftWEB.com. Opportunity Network. 2008. All Rights Reserved.