I got a few of these texture mold from Delphi, they are lighter and in some cases less lines and design than the Colour de Verre molds that I have. Their firing schedule is as follows. It is faster and goes up higher than the Colour de Verre molds but seemingly works fine. I did a few test pieces, mostly to test color and I think I prefer opaque glass on these. Opaque helps you to more fully see the design of the mold in the glass. Also I prefer not using frit, however I have only tried that on one of the molds, the Colour de Verre mold, but for now I will refrain. Also on the test piece I used red opaque with a clear base. That came out fine. I used brown with black and ivory opaque with a clear base and that came out real pretty.
But now a mold from Creative Paradise Inc.
This is smaller, 8 3/4" by 8 3/4" and the design is not as pretty as the Colour de Verre molds but it might look nice. I am fusing a red streaky piece of glass which has autumn colors in it as well on this mold along with a clear base. I picked the red with the idea of having it look like a veined red maple leaf and I used the following firing schedule:
300dph.....1360 degrees....................hold 20 min
300dph.....1465 degrees...................hold 5 min
Full.............900 degrees...................hold 1 hour
100dph........700 degrees..................Off
So this is how it came out, pretty soft red glass with veined leaf pattern. I am currently slumping it into the mold which is 4 5/8th square. Unfortunately I wound up cutting one side 5 inches long, so the glass itself is a little big for the slumping mold. I hope this does not cause a problem. I slumped a piece of glass that was a little bigger than its mold before and nothing too bad happened. We shall see.
Well, out of the kiln it came and it slumped into the shape fine but the bottom of the piece was covered with what might have been devitrification. I tried to polish it off with my diamond hand pads but was left with a few scratches on the bottom, which perhaps will come off with more finer polishing with the hand pads. Mark suggest a felt bottom and I will check that out at Louis Does or in a sewing store when i go for pins
Before moving on to some other things, full fusing flower parts and doing a screen melt, I am going to post pictures of the other texture molds that I have. They are cool.
So after this is done I will scrape the kiln shelf of the kiln wash and recover it. Perhaps I will have to use the other side. Once covered I will do screen melts again following the information I received in Paul Tarlow's ebook. I believe I can put a clear border around the piece to make it look more finished. I used a mixture of blue transparent with a little purple transparent, some white and a bunch of clear. Mark suggested doing more of the pattern pieces for the store in Newcastle and so I will. In trying to clean off the mold, stupid me, I scraped the mold and so I will get some more, but the scratches on the bottom of the mold may add some character. Lets hope.
This was done with the botanical mold. and it came out fine, a really pretty pattern. We see it now with white remnants of mold spray. That comes off. The other problem is that I stupidly added a clear piece which was much bigger than the brown piece of glass and that will have to be ground down before slumping it. I also used the following schedule off of the Colour de Verre website.
100dph.........................................300 degrees....................hold 30 min
150dph.........................................1250 degrees.................hold 30 min
150 dph........................................1370 degrees............................hold 5 mins. And here is where they gave me a range for the process temperature. The range was from 1350 to 1400 degrees and I choose 1370 degrees.
Full.............................................900 degrees............................hold 1 hour
100 dph.......................................700 degrees............................Off
Once getting this clean I noticed a few spots that would not come off. Probably some sort of devitrification, so the next firing will be an experiment. I am using two piece of 3mm clear glass and I placed it on the spiral pattern fusing mold. Deep spirals many different sizes, very pretty pattern. I cleaned the glass carefully and I am also going to change the firing schedule. I am lowering the processing temperature to 1355 degrees and holding that for 3 minutes. Going to clean off my work table and make an extra effort to keep that area clean, putting paper down first and then the grate on which I cut the glass next. I think that my kiln fires hot so perhaps this will help. Also I put the mold on a 2 inch stand or kiln furniture even though they suggested 1 inch. This will bring it closer to the heat but those pieces or stand were already in there and I left them in. so this experiment will not be as valid as I could get. My laziness is a problem. But lets just see.
So as you can see it came out pretty well except for lots if what appears to be bubbles or flecks of glass, but it does not look bad it kind of looks good. I do not know exactly what this means because I read yesterday that devit is often in dark opaque glass and in this experiment I used clear. I guess the best experiment will be on dark opaque with the temperature I used in this firing. I slumped it and it came out ok.
The next experiment will be with a dark opaque glass with clear on the bottom and using the firing schedule that I used for the above. In between this I tried to fire polish a screen melt and it did not quite work. That was the second time I tried a fire polish schedule for that piece and the first time the kiln did not complete the full schedule and it stopped with error message PF2. But my next project will be another attempt at the botanical pattern melt and if that works then I will assume that there may be some problem with the glass.
Well, it came out a little better but it still had parts which look like as Mark describes them "dusty". I had fewer of these spots than the previous ones. Perhaps I can only use clear or transparent glass on these deeper molds. For the next experiment after I slump this blue piece will be too use a smaller less deep mold.
So the next one will use this mold with the following firing schedule:
300 dph.............................1360 degrees........................hold 20 mins
300 dph..............................1465 degrees.......................hold 10 mins
Full.......................................900 degrees......................hold 1 hour
100 dph.................................700 degrees.....................off
Again, because I am not covering the whole mold, only using a portion of it I will lower the processing temperature to 1455 degrees and hold for 5 mins. Again, since this mold is not as deep or heavy and It is not held for such a long time or goes up to its processing temperature as quickly, I will try it with an opaque glass but see if I can find a light colored opaque on the bottom of which I will put clear.
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