Showing posts with label firing schedule. Show all posts
Showing posts with label firing schedule. Show all posts

Friday, April 20, 2012

Frit Mandalas Using Glassline and No Days Liquid Fusing Adhesive

If you're interested in purchasing the plates below, they're currently for sale at the Noyes Art Gallery in downtown Lincoln through the month of April. After that, perhaps I'll list them on Etsy. Contact me if you're interested.
Ready to fire in the kiln
No Days Liquid Fusing Adhesive can be used with frits to easily create complex designs. In this set of Mandala plates, I've added Glassline Pens to the mix to add extra layers and dimensionality.
Base layer of clear becomes the clear cap

Saturday, January 22, 2011

My Very First Mesh Melt...

I've been wanting to try this technique for ages, and well...I finally found the time to pursue it.
My uncle picked up a stainless steel rack from Bed, Bath and Beyond and some stainless steel wire from the local hardware store. He wired the rack for me, and I stacked it in the kiln.


I've got a good 5-6 coats of Bullseye kiln wash on my shelf, and brushed a bit of kiln wash on the posts as well, just in case the glass ends up going further than I had planned.

I didn't put much glass on the rack, as it's the first time. I'm just curious to see what kind of pattern I'll get with the lines on the rack. I fiddled with a couple of firing schedules I found at Clearwater Glass Studio and FusedGlass.org.

At around 1460, I opened the kiln to see the glass just beginning to fall through the rack, resembling taffy, or that ribbon candy.

[Warning: When you open the kiln at higher temperatures, you need to wear UV protective eye wear, and high temp gloves. Cotton clothing is also less likely to ignite than synthetics.]

When I checked the glass again at 1680 degrees, most of the glass had fallen through to the shelf. Only strings of glass remained on the rack, so I decided to call it good, interrupting my schedule to skip to the next segment of my firing schedule.


It is likely that for this reason, when I opened the kiln, there were shards of glass EVERYWHERE! The high temperatures warped the wire rack, so if I were to do the melt again, I would use kiln posts to support the sides.

However, I am very satisfied with the results of this first mesh melt. The photo below shows the back side (against the kiln shelf) of the glass at top, and the top side of the melt at the bottom. Hmmm...that's a bit confusing, huh?


Bottom side of mesh melt.
Top side of mesh melt.

(Note that none of these photos show the glass hot inside of the kiln. Maybe next time...)

For anyone wanting a hard copy of the mesh melt, or even the pot melt techniques, Brenda Griffith has a great introductory kilnforming / glass fusing book:

How to Make Layered Dichroic Jewelry - Part 2

This post is a continuation of a tutorial on layering dichroic glass to make gorgeous fused glass jewelry. For the first part of the tutorial, check out this post...

So, the layered dichroic tile came out of the kiln and looks wonderful. I usually let it sit for a few weeks so I can enjoy the full effect of all that sparkle :)


After I've got an eyeful, it's time to think about cutting this baby down to size. I want a bunch of pendants, but the cabs you'll create by cutting the tile down work great for rings, purse hangers, mosaics,...you name it!

I've begun to cut my dichro tile down a bit... I just use a regular glass cutter (my preferred cutter is my Toyo pistol grip, no oil necessary). For the first few cuts, you need to remember that:
A) This tile is thick! All the layers fused together have made this tile about 1/4" thick. Thicker glass is tougher to break.
B) When scoring glass, stress can build and fracture the glass at unforeseen points if you're trying to break off too little.
The beginning tile was about 4" x 4." When I attempt to score and break my glass, I don't try to take off less than an inch, initially. Once your pieces start to get smaller, it's easier to cut them down into smaller and smaller pieces, to a point.
When breaking the glass initially, a regular pair of running pliers doesn't really work. IF you can squeeze really hard, the tile MIGHT break. The tools I use to break the tile are:

1) A hammer - you can tap lightly on the underside (opposite side of your score) of the tile all the way along your score. Eventually, the piece should knock off where you asked it to. Sometimes, you will be surprised. This gets harder to do as the pieces get smaller. But, by that point, you can switch to your running pliers.
2) The Morton Glass Works Safety Break M-80 Tool - I was able to use this for the very first time on the thick tiles last Saturday. You have to squeeze fairly hard, but it breaks really well! The Morton website has some really great videos that make cutting glass look like a breeze.
3) Diamond Blade Saw - If you've got access to a wet tile saw with a diamond blade for cutting glass, you can make very accurate and exact cuts. If it's a ring saw, you can even cut custom shapes. This is a costly tool, but you can sometimes have the local stained glass / fusing shop cut the tile for you, or even show you how to cut it for yourself.


If you're not crazy about the raw dichroic on the edges of the tile, you can nip them off with mosaic nippers. These pieces can be piled together when you put them back in the kiln and will form a puddly cabochon with lots of sparkle.


Once you've finished cutting all of the pieces, it's time to put them back in the kiln.

Each kiln is going to fire a bit differently. This is just a recommended firing schedule, and I'm using my "Little Miss" Caldera kiln with a 6" shelf.


For a nice, clean edge that holds the shape of the cut, you'll fire to approximately 1420 degrees F and hold for 5 minutes. Since my studio is really cold right now (we're in the middle of a blizzard), I slowed the ramp up to 500 degrees per hour to 1000; then continued AFAP (as fast as possible, or 9999) to 1420 and held for 5 minutes. Follow this segment with your annealing schedule back down to room temperature.

This schedule will soften the edges without globbing out of shape.


For my scrap bits, I'll throw those in the kiln AFAP all the way to 1480 for 8-10 minutes. I want these pieces to be rounded and full fused. They're all really small pieces, too. So, they won't shock from the heat on the way up.

Look for my last post in this series on attaching the bails with No Days BailBond...

Thursday, February 25, 2010

Time to Tweak

I just finished my first "official" firing of my new Paragon Pearl 22 kiln.
It's been so long since I have fired a large kiln. I'm still missing a few things from the cross country move, and my log book with all the firing schedules is probably in the same box as the missing bracelet mandrel. (But, that's a whole different story.)
Here's the picture that I took this morning upon opening my kiln. I'm happy with how the designs turned out, but the firing schedule needs to be tweaked a bit. Each kiln fires a little differently.


The schedule that I used was tweaked a bit from the full fuse schedule at fusedglass.org (a great resource for glass artists, by the way).
After taking the pieces out of the kiln, there was still some texture; on the underside of one piece, and the top side of the other. At a full fuse, these two pieces should have fired fully and lost all texture. So, now I know for the next firing that I need to go to a higher temperature, and hold that temperature for a little longer.

Texture that shouldn't exist at a full fuse.

Back into the kiln the plates go, with some more designs that I've been working on. We'll see how the tweaked schedule works, and build on it as necessary.

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