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Iron actually does affect color. Fe can be in a lot of states of valence and can profoundly affect glasses that contain silver, copper or gold.
Lithium is a great place to get cords. It also reduces thermal shock substantially when used in excess. It also eats your crucible/ Hotter melts save time, but that time may get spent later banging the furnace apart replacing the pot. Hotter melts also bring cords. It's because the pot is dissolving.
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Where are we going and why am I in this basket?
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