John croucher’s class ways to make a lot of money at penland – craftweb hot glass talk

It was a really fun time, great group of folks, and we did lots of small melts. Four of pete’s 7" pots in a sliding top-door gas furnace. Focus on phosphates, some cad sels, and some misc. Other ionic colors. I brought down some of my gold sands and a ways to make a lot of money bit of pb and we did one phosphate gold pink ways to make a lot of money in nick fruin’s electric kiln with a clay pot from china. We thought it didn’t work at first, was just white, then after someone reheated it a few times it struck ways to make a lot of money really nicely to an opaline pink. John showed us how he is most fond of the ways to make a lot of money trident-seal test and how to do those with an (expensive) polarimeter. Jordan and james and eric were the other craftweb folks ways to make a lot of money there, and kenny stopped by once or twice too. No women unfortunately, a real sausage fest. Penland was a great place for a class like this. Heard it was the longest waiting-list for a class in penland history, and to think I was concerned it wouldn’t fill at first. I think john had a good experience and was fond ways to make a lot of money of the group. Unfortunately his son luke, who was supposed to be a co-teacher, couldn’t get a visa approval to travel. So we got mark peiser to fill in instead, not too shabby of a replacement. Mark said he thought it might have been the best ways to make a lot of money class he’d been a part of. We got to visit his studio on the last day ways to make a lot of money which was a real treat. I’m motivated to fire up my color furnace again now..

There were several of us at the class that are ways to make a lot of money interested in seeing if it would be possible to build ways to make a lot of money our own version of the strainoptics unit. From information available online, it seems like it should be possible. The difficult bit will be getting the thing reasonably accurately ways to make a lot of money set and calibrated. If that doesn’t work out, then what I heard is that the going rate for ways to make a lot of money a new unit from strainoptics is $3,600.

We did discuss the ring test in the class, but you are correct that the class didn’t actually perform a ring test on any of the ways to make a lot of money glasses we melted. If this class were to be taught again, perhaps the students might be encouraged to make some ring ways to make a lot of money test samples as well as the hagy seals— since the ring test doesn’t require specialized tools that shouldn’t already be in a glass shop.

I understand john’s reasoning to prefer the hagy seal for his environment. It’s the most expedient means to ensure the product gaffer ways to make a lot of money is producing is all compatible and that mistakes weren’t made in batching. However, his needs and pressures are different than that of many ways to make a lot of money glass studios. Being comfortable with a compatibility test that doesn’t require an expensive uni-tasking tool is certainly important for most studios. The ring test certainly has it’s issues (but everything does— no free lunch and all), but I think has its place.

I think what I would do first with a trident ways to make a lot of money seal test, if I only had a polariscope, is make a seal using all three canes out of ways to make a lot of money the same master glass clear, anneal those and then see what zero strain looked like. Then I would compare that trident seal to a mismatch ways to make a lot of money test using two outer canes of whatever you were testing, against the same clear master glass in the center. If the center cane was showing the same shade of ways to make a lot of money light grey as the first test then there is no ways to make a lot of money strain, no mismatch. If the center cane is much lighter, whiter, brighter and not at all the same shade of pale ways to make a lot of money grey, then strain is showing up. To find out how much and whether it is showing ways to make a lot of money tension or compression, then there is the ring test, thread test or chip test on a strip of sheet ways to make a lot of money glass (made out of your master clear).

This is what bullseye uses. It objectively gives you a handle on how much strain ways to make a lot of money but only by a lot of comparative experience. The same goes for the ring test. The ring test is good for indicating tension or compression, but not good giving an objective assessment of the degree ways to make a lot of money of strain without a good deal of experience. Furthermore, getting the two glasses to be of equal thickness in ways to make a lot of money the ring test is not easy and that is very ways to make a lot of money important to achieve an accurate assessment.

Unfortunately the dilatometer doesn’t provide you with comparative strain points, although, granted, it does yield deformation and tg temps. It does give objective LEC’s though, up to the deformation temp, although even the most expensive dilatometer (upwards of $30,000) doesn’t give outputs any more accurate than +/-1 points at best. The bottom line though, is that the dilatometer doesn’t reveal helpful mismatch viscosity data.

If you were melting your own color and wanting to ways to make a lot of money get glasses compatible, then repeated melts would eventually yield you a trident seal ways to make a lot of money that showed no strain under your polariscope, as you adjust the chemistry. If you were repeatedly doing this for lots of color ways to make a lot of money then a strainoptic polariscope cuts lots of corners and starts ways to make a lot of money to look like good value.

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