firstname.lastname@example.org wrote:I have recently done some work with frit balls:
I’d start with a 20 minute soak in undiluted CLR. Abrading and rinsing after the soak is what will release the primer.
I’m surprised that clear picked up so much primer. If following all of our recommendations (BE primer, new application of primer on a scraped shelf, kiln dried, frit ball firing sched, etc.), I’d check in at process temp for to see if the process soak could be shortened or adjust the firing schedule to minimize heatwork. The ideal, which should be attainable with Clear, is to have that great frit ball shape w/ a clean release.
...To make the opaline frit-ball bowl shown above, first create a dam by cutting a 5.5" circle in a sheet of 1/8" fiber paper,leaving the border intact. Place the dam on a primed kiln shelf and load it up with about five ounces of frit balls. This approach essentially creates a new material that is a few frit balls thick with a network of tiny connection points. Nestle them into place and fill in any large gaps or thin spots. Tack them together by firing at a rate of 300°F (167°C) per hour
to 1375°F (746°C) for 10 minutes. Slump the piece in a separate firing using mold 8746. We recommend annealing in both firings...
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