Search found 831 matches

by Marty
Tue Aug 07, 2018 6:03 pm
Forum: Techniques and Tools
Topic: TaoFiber - Fiber Paper
Replies: 8
Views: 15864

Re: TaoFiber - Fiber Paper

Sharol- I've been using the fiberfrax 970 equivalent in 1/32" for years. It's expensive- about $2/sq.ft. in 2'x160' rolls. I'm curious about the cost of "your" stuff. The 970 has a very faint weave on the front, a little rougher on the back but is the smoothest paper (once you get pas...
by Marty
Wed Aug 01, 2018 9:52 pm
Forum: Techniques and Tools
Topic: Digitry GB-1 controller discussion
Replies: 12
Views: 23665

Re: Digitry GB-1 controller for sale

Glad this post came up . . don't think I would care for this system. I like thinking in terms of the safe speed limit on a particular stretch of heating and the destination - speed kills. I don't need to know how long it will take to get there unless I will be needed for firing intervention suck as...
by Marty
Tue Jul 31, 2018 9:23 am
Forum: Techniques and Tools
Topic: Digitry GB-1 controller discussion
Replies: 12
Views: 23665

Re: Digitry GB-1 controller for sale

It's the same programming as those "other" devices but seen from the time side. You enter elapsed time from start and then your target temp for that segment. One of my typical schedules reads 4:00 (hours:minutes), 1100 (temp F) 4:30, 1100 (30 minute hold) 5:00, 1470 5:15, 1475 (15 minute h...
by Marty
Tue Jul 31, 2018 9:13 am
Forum: Techniques and Tools
Topic: Digitry GB-1 controller discussion
Replies: 12
Views: 23665

Re: Digitry GB-1 controller for sale

I’m curious, how do you program AFAP on these controllers? My understanding is that you don't. You program how long it takes to get from one temperature to another. So there's no as fast as possible. AFAP on the Digitry is 1 minute. You're working with elapsed time from the start of the schedule.
by Marty
Fri Jul 06, 2018 9:52 am
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 14125

Re: Iso-mag board

Another closely monitored private board, but Pete is more irascible than Brad. It's mostly blowing but there are a few active fusers. No anonymity there.
by Marty
Tue Jul 03, 2018 11:18 pm
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 14125

Re: Iso-mag board

Brad- One of my Canadian students uses it instead of VB- it's magnesium salt based, seems to be stronger than VB with less warpage. I asked on Pete's board, we'll see what comes up. I'll also call Jim Wiles (?) and see what he knows.
by Marty
Tue Jul 03, 2018 1:39 pm
Forum: Techniques and Tools
Topic: Iso-mag board
Replies: 8
Views: 14125

Iso-mag board

Anyone have experience with this stuff from Pyrotec (shelves, dams, molds, whatever)?
by Marty
Thu May 24, 2018 11:47 am
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

I wouldn't rely on thinfire for that. Do you need serious weight to dam your work?
by Marty
Wed May 23, 2018 8:37 pm
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

Bonnie- "bricks" sounds ominous, large masses of heat sink. Can't you use something smaller, like cut up shelves or other kiln furniture to dam your work?
by Marty
Thu May 17, 2018 12:53 pm
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

Bonnie- In my opinion those holds are completely unnecessary, as is any change in ramp up to 1000 (or so). You want to go slow enough to avoid thermal shock but that can occur anywhere along that ramp so going slower to 350 and then speeding up does nothing for you. What do the holds do? I'd like to...
by Marty
Thu May 10, 2018 4:33 pm
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

Bonnie- I hadn't understood how much difference in height you had. I'd do it at 100dph to process temp, no holds or changes on the way.
by Marty
Thu May 10, 2018 12:53 pm
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

I have issues with "120 to 350, hold 10, then 200 to 1250 hold 30"- I think it's mostly voodoo- but for glass less than 6mm thick you should be ok with that ramp. Did the glass get bonked (technical term) in any way before firing? I've healed cracks that hadn't separated by halving the ram...
by Marty
Thu May 10, 2018 8:18 am
Forum: Techniques and Tools
Topic: Hairline 'crack'
Replies: 18
Views: 27478

Re: Hairline 'crack'

Bonnie Rubinstein wrote:I noticed it ramping up- so it did anneal after. Maybe that is hopeful. But I may need to ‘disguise’ the line with some colored glass and that means re-firing. I wondered if that ensures success for healing, as well.
Why are you looking in the kiln on the way up?
by Marty
Wed Apr 25, 2018 3:20 am
Forum: Techniques and Tools
Topic: Slumping issues
Replies: 17
Views: 28058

Re: Slumping issues

Harmless hyperbole. I was thinking of some of the meaningless schedules posted here, like the 10 minute hold at 350, then a change in ramp to 500 with another small hold, and so on. Why hold (and why there) at all for a simple slump? What's going to happen? If it's faith-based, that's a valid reason...
by Marty
Mon Apr 23, 2018 4:00 am
Forum: Techniques and Tools
Topic: Loose abrasives vs. bonded(pads,etc.)
Replies: 3
Views: 7294

Re: Loose abrasives vs. bonded(pads,etc.)

I understood that any given abrasive grade contained a range; an 80 grit diamond lap pad included mesh sizes of 70 to 90, for example. Perhaps for something more exacting (like polishing lenses) a more precise grade is used?
by Marty
Sun Apr 22, 2018 3:27 pm
Forum: Techniques and Tools
Topic: Slumping issues
Replies: 17
Views: 28058

Re: Slumping issues

200 dph to 1200, hold until slumped (look at it), then drop to 900 etc. No need for elaborate holds at 1100 etc.
Each mold will fill at a different time/temp.
Trying to flatten that piece will not give you joy. I'd give it away and start on the next one.
by Marty
Mon Mar 26, 2018 10:45 pm
Forum: Techniques and Tools
Topic: Cheap vases - are they safe to fire?
Replies: 3
Views: 7174

Re: Cheap vases - are they safe to fire?

I'd be more concerned with incompatibility.
by Marty
Fri Mar 16, 2018 10:59 am
Forum: Newcomer Forum
Topic: Disposing of ground glass
Replies: 10
Views: 26415

Re: Disposing of ground glass

Don't put it down ANY drain.
by Marty
Sun Feb 25, 2018 9:40 pm
Forum: Techniques and Tools
Topic: Which properties makes blowing glass ? Engineering Cold Warm Thermoset Polymer Glass Blowing
Replies: 6
Views: 10277

Re: Which properties makes blowing glass ? Engineering Cold Warm Thermoset Polymer Glass Blowing

We haven't had acrimony on this board for a long time- I'm not sure whether I'd rather see inactivity or conflict. Mustafa- This board is not the place you're looking for, and I don't think you'd get far on craftweb either. As Brad (the owner of this board) said, we're mostly interested in fusing gl...
by Marty
Thu Jan 11, 2018 8:41 pm
Forum: Techniques and Tools
Topic: Choosing a wet tile saw
Replies: 13
Views: 22582

Re: Choosing a wet tile saw

Kerf. The width of the cut.