Casting a die from fasteners - GIF

Casting a die from fasteners.

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Previously:

1920s Demley mechanical dice - GIF
Dice dotting machine - GIF
Laser engraving wooden dice - GIF
Round spinning dice set - video

What was the glass for?

Quote:

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Originally Posted by basil3w

What was the glass for?

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If you look carefully once the brass is melted the impurities are drawn off in a single lump. that is the glass drawing the impurities together

Quote:

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Originally Posted by basil3w

What was the glass for?

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I use clear glass, not coloured. I was told that it melts and forms a "skin" over the molten metal to prevent air coming in - thereby reducing the amount of created slag/ dross. As Frank indicated, it helps pull the dross together as well making it easier to remove.