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by David Jenkins
Thu Nov 06, 2014 9:23 pm
Forum: Techniques and Tools
Topic: Silver Staining
Replies: 9
Views: 5069

Silver Staining

i fired a piece (on ThinFire) that had some silver foil decorations on it. The shelf was stained on areas not covered by the TF.

Will future firings on TF, on that shelf, be subject to staining?
by David Jenkins
Tue Nov 04, 2014 12:59 pm
Forum: Techniques and Tools
Topic: Any experience using BE molds 8919 or 8920?
Replies: 6
Views: 4221

Re: Any experience using BE molds 8919 or 8920?

@Dana:

Those tips are great help - thanks. Besides giving guidance for slumping a new mold, they allow me to parity check my schedules I've worked out independently over the last 5 years or so.
by David Jenkins
Mon Nov 03, 2014 2:10 pm
Forum: Techniques and Tools
Topic: Any experience using BE molds 8919 or 8920?
Replies: 6
Views: 4221

Re: Any experience using BE molds 8919 or 8920?

Here ya go:

8919.jpg
8920.jpg
by David Jenkins
Mon Nov 03, 2014 12:04 pm
Forum: Techniques and Tools
Topic: Any experience using BE molds 8919 or 8920?
Replies: 6
Views: 4221

Any experience using BE molds 8919 or 8920?

Have you used either of these? Easy slump? Or difficult? Got a picture of the final product?

Thanks!
by David Jenkins
Wed Sep 17, 2014 10:31 am
Forum: Techniques and Tools
Topic: Which fusing schedule should I use to keep crisp lines?
Replies: 6
Views: 5755

Re: Which fusing schedule should I use to keep crisp lines?

It looks to me (can't really tell from the image) like you might have a gap in the design pieces. If so, I'd take pains to remove the possibility of a bubble if you Flip 'n Fire.

gap.jpg
gap.jpg (12.14 KiB) Viewed 5658 times
by David Jenkins
Sun Aug 31, 2014 11:05 am
Forum: Newcomer Forum
Topic: ideas: cleaning glass & marking molds
Replies: 3
Views: 5505

Re: ideas: cleaning glass & marking molds

Good start to a "Glass Hacks" thread - thanks!
by David Jenkins
Sun Aug 24, 2014 1:07 pm
Forum: Techniques and Tools
Topic: On edge clear strips
Replies: 16
Views: 12211

Re: On edge clear strips

@Don: Won't she run the real risk of filling the clear areas with air-laden, cloudy masses?
by David Jenkins
Sat Aug 23, 2014 4:42 pm
Forum: Techniques and Tools
Topic: On edge clear strips
Replies: 16
Views: 12211

Re: On edge clear strips

Two side-by-side on-edge strips would be 1/4" of clear. Could you stack 1/4"-wide clear strips NOT on edge, so that they don't show any joint lines?
by David Jenkins
Fri Aug 08, 2014 11:02 am
Forum: Newcomer Forum
Topic: Will these directions produce a properly fused, round blank?
Replies: 21
Views: 13319

Re: Will these directions produce a properly fused, round bl

Interesting thought experiment. I'd like to see actual results. Then some results with varying diameter ratios.
by David Jenkins
Fri Jul 25, 2014 7:03 pm
Forum: Techniques and Tools
Topic: You'd think by now I ought to know this:
Replies: 6
Views: 4184

Re: You'd think by now I ought to know this:

@Tony:

Thanks. This thread seemed to drift quickly into discussions of compatibility - my original questions were posed solely to find out more of the innards of 'COE' - especially as the term is bandied about in this and other contexts.

(Showing exponents is a challenge, isn't it?) :)
by David Jenkins
Tue Jul 22, 2014 5:24 pm
Forum: Techniques and Tools
Topic: You'd think by now I ought to know this:
Replies: 6
Views: 4184

Re: You'd think by now I ought to know this:

@Rick:

I'm presuming that what you're referring to as "way more complicated" is the issue of compatibility - correct?
by David Jenkins
Tue Jul 22, 2014 12:11 pm
Forum: Techniques and Tools
Topic: You'd think by now I ought to know this:
Replies: 6
Views: 4184

You'd think by now I ought to know this:

Questions regarding the term "COE": Is this a measurement of Linear expansion? Volumetric Expansion? Something else? What are the units of COE as it's used in the glass fusing context? Isn't a COE number relevant to some particular temperature interval? And if so, is there agreement among ...
by David Jenkins
Wed Jul 16, 2014 10:10 am
Forum: Techniques and Tools
Topic: Alternate Source for TF 3 Relays
Replies: 4
Views: 5321

Alternate Source for TF 3 Relays

The Orton controller on our Paragon Fusion 10 kiln takes 30A TF 3 relays. Anyone know of an alternate source for these that's cheaper than Paragon ($30.25)?
by David Jenkins
Thu Jul 10, 2014 2:48 pm
Forum: Techniques and Tools
Topic: Kiln Relays
Replies: 51
Views: 36225

Re: Kiln Relays

@Suds: Any way to modify your baby-sitter to measure and accumulate the time the relay is energized? It'd be fun to know the distribution of on-times, wouldn't it?
by David Jenkins
Wed Jul 09, 2014 4:02 pm
Forum: Techniques and Tools
Topic: Kiln Relays
Replies: 51
Views: 36225

Re: Kiln Relays

And I in no way was trying to imply that I had any kind of an idea how to compute an accurate count - I was just trying to come up with some ROM. On my controller, it sounds like the relay makes, and then drops out after about 1-2 seconds. If the schedule is on the way up, with any kind of medium ra...
by David Jenkins
Sun Jul 06, 2014 5:10 pm
Forum: Techniques and Tools
Topic: Kiln Relays
Replies: 51
Views: 36225

Re: Kiln Relays

A cycle every 6 seconds would be 10/duty minute, 600/duty hour. My costs per firing are about $1.80, and it's a 7200W kiln. I pay about 10 cents per KWH, so I use about 18 KWH. so that's about .5 duty hours for the complete firing cycle. Hence maybe 300 cycles? Have no idea if that math holds up - I...
by David Jenkins
Tue Jun 03, 2014 7:34 pm
Forum: Techniques and Tools
Topic: Where to get sliver leaf in large (7-8" sq.) sheets
Replies: 2
Views: 1953

Re: Where to get sliver leaf in large (7-8" sq.) sheets

Thanks, Cynthia. I'm pretty sure, now, that it was foil that I had - not leaf. I had used some copper foil and it was so much heavier (thicker) than the silver I was using, that I just assumed that what I had was leaf. Anyway, I ordered some of the BE foil and it's identical, as best I can tell, to ...
by David Jenkins
Wed May 21, 2014 6:57 pm
Forum: Techniques and Tools
Topic: Where to get sliver leaf in large (7-8" sq.) sheets
Replies: 2
Views: 1953

Where to get sliver leaf in large (7-8" sq.) sheets

About 6 years ago I got some silver leaf in sheets that were about 7.5 in. sq. I've about used that supply up and need to get some more. The original packaging shows no sign of who the original vendor might have been. It does carry the code "TS0217" on it, though. All I can seem to find ar...
by David Jenkins
Tue May 06, 2014 10:29 am
Forum: Newcomer Forum
Topic: Perfecting this fused bowl-to-be
Replies: 4
Views: 4061

Re: Perfecting this fused bowl-to-be

If this picture is of the results of the first fuse, I'm impressed by how well you matched the outside curves on the individual pieces.
by David Jenkins
Thu May 01, 2014 6:58 pm
Forum: Techniques and Tools
Topic: Bending 2mm Stringer
Replies: 12
Views: 7395

Re: Bending 2mm Stringer

The catenary is an Interesting function that describes the shape defined by a wire, chain, or rope, etc. suspended between two supports. It is given by: y = a cosh ( x /a) where a is the distance between the two supports, and 'cosh' represents the hyperbolic cosine function. (I just knew a math majo...

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