April 12, 2012

Deep Slump Glass Fusing Mold Part 2

Image of the top view of deep slumped glass fused plate

Top view of deep slumped glass fused plate

Image of the Side View of slumped glass bowl

Side View of slumped glass bowl










This is Round 2 of the deep slump firing.

We are trying to take out the kinks in our kiln and our deep slump program.  The following program settings for our deep slump firing for our skutt kiln where the results of the images to the left of this post.

Ramp    Target      Deg/Hr     Hold

  1.                   150                500          .15
  2.                   250                1100         .05
  3.                   100                1200         .20
  4.                   9999             950            .60
  5.                   150                800          .10
  6.                   300                225          0

Now If you notice on the picture on the left just above the center is a bellow button the corresponds to the air hole drilled into the ceramic mold.  It is obvious from the belly button the the way the glass piece  took the complete shape of the bottom of the ceramics mold that the kiln was definitly hot enough.  In fact because of the belly button I would wager the kiln was too hot.

Moral of the story.  Looking at the 20 minute hold at the 1200 temp, I would think that this might be excessive especially considering that I go sooooo slowly at 100 degrees per hour between 1100 and 1200.  I am going to try again with another thick piece of glass but holding only .5 minutes not the .20.

Check back for updates.

Image of the Inside of ceramics deep slump mold.

Inside of ceramics deep slump mold. Note the orange colored piece is just to show the depth

Image of the Bottom of the Deep Slumped Piece. Notice the belly button.

Bottom view can you see the belly button left by the Air hole in the mold?

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