Hi guys. Hoping you can point me in the right direction. Tried making reindeer in photo twice now. The first time there was devitrification just on one antler (the whole small piece of glass I had laid across another at an angle) and I thought maybe i hadn't cleaned that bit properly or something so tried another one. This time had it on two random antlers (see photo) The common factor is that they are the smallest parts so I'm thinking perhaps for this item I need to adjust some settings but not sure what I should adjust.
I'm using a Paragon SC2 with the window blocked up so even heat distribution. Tried the second one on thinfire paper instead of just a kilnwashed shelf so that's not it. Using the full fuse with Bullseye glass program as recommended by Warm Glass UK, but I do tend to skip the fuse at the 5 minute mark as everything is done by then.
222 per hour to 677 degrees c hold 30 min
333 per hour to 804 degrees c hold 10 min (I use 5 mostly)
999 per hour to 482 degrees c hold 60 min
83 per hour to 371 degrees c End
Do I need to reduce the fusing time a bit more (give it less than 5 minutes), reduce the fusing heat a little or could it be something to do with the time spent at other temperatures on the way up?
I know it's probably a case of trial and error but if someone could at least point me in the direction of the most likely culprit I'd be very grateful. I have the option of trying brown antlers instead but that feels a bit like giving up!