[Jewelry making - Article 00173] - [Orchid] Mokume gane still it will not bond

[James Kallas]

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    A question for you mokume artists out there? I have a billet that
    has fused except for the middle section it is 18 Kt green 14 kt
    palladium white and 14 kt rose. the section that has not fused is 18
    kt green and 14 kt white and is dead center of the billet all the
    other layers have. I have fired this 3 times after thoroughly sanding
    and cleaning the surface, twice  AT  1225 deg F for 8 hr and once  AT  1525
    Deg F for 3 hr and still it will not bond, is there any thing that I
    can do to promote these pieces to fuse and will it hurt the metal to
    keep firing it? The rest of the layers seem to have fused solid and a
    prior billet the same dimensions of 22 Kt and shakudo gave me no
    trouble. Any advise would be greatly appreciated 

Thank you in advance James Kallas
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