CraftWEB Hot Glass Talk  

Go Back   CraftWEB Hot Glass Talk > Color work from rods and batch glasses

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 04-30-2018, 11:40 PM
Dan Vanantwerp Dan Vanantwerp is online now
Registered User
 
Join Date: Apr 2017
Location: Bozeman, MT
Posts: 190
Dan Vanantwerp is on a distinguished road
Brossphate v. Cristalica

I melted my first batch of Dave's phosphate opal this weekend. It was the straight formula:

(http://talk.craftweb.com/showthread....ight=phosphate)

The compatibility tests did not make it out of the annealer...except for a couple and they blew apart right at the saw. First pic has some all-brossphate pieces to show the color at the top. At the bottom, the broken pieces are inside or outside color-clear...no difference. Last 2 pics show the color intensity achieved for a couple all brossphate pieces.

I've got my work cut out but I'm hoping for a little direction. My only clue is the E&T measurement which for Dave's 2.5% is only 92.6 while Pete's silver opal is 94.1. The silver opal has fit perfectly for me to Cristalica with ring tests for final proof. I have no idea what the Cristalica E&T would be so I have to make a guess that it's closer to Pete's than the Brossphate.

I'd like to intensify the phosphate similar to Jordan's results. Coincidentally, I can raise the E&T to 95.1 by increasing the phosphate 3.6%, but is this really a good way to modify the expansion? Pete usually points to soda ash and sand for moving the expansion. Should I use soda/sand to find a compatible 2.5% glass or just modify the phosphate and see if I can kill 2 birds with 1 stone?

Thanks for any input and to Dave for sharing this formula. My results need work but that was really fun to work with!
Attached Images
File Type: jpg image1 (2).jpg (46.1 KB, 31 views)
File Type: jpg image2.jpg (30.5 KB, 17 views)
File Type: jpg image3.jpg (25.9 KB, 17 views)
__________________
My furnace setting: 2112
Reply With Quote
 


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 On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 02:53 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.