Regarding the kilncasting process for Burnt Scarlet Striker and other colors, Ted says:
"In general we advocate casting at temperatures lower than 1600° F. In fact, we find that we typically get good results in casting by holding at 1525°F/830°C for the time that is appropriate for the object in question, ranging from less than an hour to over 8 hours. Casting at much higher temperatures makes the glass more likely to react with materials with which it has contact such as the mold, dams, or fiber paper. The results are typically that the surface is more likely to become extremely hazy, pitted, or devitrified (though these problems can arise as a result of other factors in the casting and firing process as well), and can actually even increase the glass’s viscosity, making it less likely to flow.
When working with 001823 (Ruby Pink Striker), 001824 (Ruby Red Striker), and 001831 (Burnt Scarlet Striker), we find that the most critical issues are gradual heating and holding the glass at 1250°F/677°C for 1-2 hours as the glass is being heated. Doing so will make the color develop to its target hue. If the glass is heated too quickly at through this temperature it is much more likely to develop sapphirine qualities of appearing blue/brown in reflection and close-to-target hue in transmission.
The cycle that we’ve suggested in TipSheet 8 is a very good starting point for casting, and the document addresses a number of other critical casting issues as well.
I hope that this is helpful."
Here is the link to TipSheet 8: http://www.bullseyeglass.com/pdf/techno ... eet_08.pdf
Good luck with your work in this color!