CASTING PYRAMID MOLD 2

So I am continuing to experiment with the pyramid mold.  This time instead of using my home made frit mixture which condensed into the mold somewhat more than the first frit mixture(which mixed home made frit with store frit) I am using scrap glass.  After researching how much scrap glass I should use, I learned through Bullseye web site that inorder to determine the amount of glass you should use in a mold you can fill the mold with water, measure the amount of water it takes to fill the mold and multiply it by 2.5.  In the pyramid case it resulted in 10 ounces.  So i measured 10 ounces of scrap glass most of which was transparent glass.  The colours were red, blue, violet and some opaque white glass.  I cut those into small pieces and put it into the mold layering some of it on the top and set the firing schedule as follows:

200dph.....................................1225 degrees..................................hold 1 and 1/2 hours
600dph......................................1520 degrees...............................................hold 2 hours
Full ...........................................900 degrees.................................................hold 1 hour
6 degrees....................................800 degrees......................................................0
12 degrees...................................700 degrees...................................................off


Well it all came out quite muddy, colors muddy and mixed together.  Also a few pieces of the glass scrap pieces that i piled on top must of fell off, it was lying on the floor of the kiln and so the pyramid was small and had some sharp peaks on the bottom.  I have not finished it or coldworked it yet.

multiple home made frit on glass

Inorder to create these I place a six and 1/2 clear disk on the bottom and covered it with two different colors of home made frit.  As you can see one was green and yellow big chunks while the other was red and yellow finer frit.  Over that I placed clear fine frit in hopes of filling up space and creating a full two layers piece.  Well what happened was that the side with the bigger chunks of frit was the prescribed 1/4 inch of thickness but the other side with the thinner frit felt like onl y one layer.  I had  fired this with the following schedule:

400dph.................1150 degrees...................................hold 0 mins
150 dph................1250 degrees...................................hold 60 mins
400 dph................1465 degrees...................................hold 20 mins
FULL,,,,,,,,,,,,,,,,,,,,,,,,,,,,.900 degrees.....................................hold 60 mins
150 dph................700 degrees.....................................off

Well the result was that on the thin side the glass started to pull inwards.  it also cracked in the thinner part of the glass.  This could all be that the glass I used to make the frit was used too many times and that is why it is cracking.  But alas, Can this piece be saved, I asked.  So just as an experiment, there already is a crack in the piece, I put it in the kiln, over thin fire paper, and placed it smooth side down and place two pieces of clear glass on top of it, not two layers but one piece along side another since I wanted to use the spare glass.  So what I will be looking for is if I can get rid of the break in the glass, and now that I think about it, I bet it will not work,  But if it does go by adding an extra two pieces of clear glass to the bottom I will slump it.  I fired it following the Bullseye Firing: Basic Applications  for full fuse:

400 dph..................................1225 degrees..........................hold 1 hour
600 dph...................................1480 degrees.........................hold 10 mins
Full............................................900 degrees.........................hold 1 hour
50 dph.......................................700 degrees.........................1 min
off