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WG BALL Leadfree flux

  • Soyer Marie-Hélène
    • 4 posts
    November 10, 2020 8:19 AM EST

    Hi everybody,

    We don't have success with the flux copper tint 7438.
    We've tried 7438 with mesh 60, with mesh 120, with glue, without glue.
    We've applied it with water and without water.
    We've cooked at 800°C during 2', 2'30, 4'.
    And at 820 °C during 2, 2'3, and 4.
    And we cooked at 840 during 2 and 2'30.
    Below, you can see 2 enamel pieces cooked at 800 and 820 during 2'30.
    Enamel pieces cooked at 800 are perfect but very dark. They look like hard silver flux or flux pink tint but we don't reach the link copper pink we want as the flux copper tint should do.
     
    Enamel pieces cooked at 840 and 860 are lighter without being perfect and are burned at the edge.
     
    Thank a lot
     
    Marie-Hélène
  • Trish White
    • Moderator
    • 114 posts
    November 13, 2020 7:20 AM EST

    Have you tried 1425 for 2 mins. - I don't see that on your experiment. You went higher but not lower.

  • Soyer Marie-Hélène
    • 4 posts
    November 13, 2020 7:41 AM EST

    Yes we try lower and it's brown!

  • Trish White
    • Moderator
    • 114 posts
    November 20, 2020 4:44 PM EST

    What brand are these enamels that you are using?

  • Trish White
    • Moderator
    • 114 posts
    November 20, 2020 4:44 PM EST

    Ok, I see it was WG Ball - I have not used them.

  • Trish White
    • Moderator
    • 114 posts
    November 25, 2020 7:27 AM EST

    I am wondering if they sent you the wrong number - your samples look more like 7479- there certainly is a drastic color change from the sample - 

  • Soyer Marie-Hélène
    • 4 posts
    November 29, 2020 2:59 PM EST

    Hi,

    They send the wright color they say.

    Last week they send back an other sample of the same 7438.

    And it's the same.

    So I continue my researchs.

     

    Thank youy Trish

     

  • Trish White
    • Moderator
    • 114 posts
    November 30, 2020 1:08 PM EST

    Well, I would have to see them prove to me by video that they come up with the same color as the sample- because its obvious its not the same -  unless your copper is tainted - possibly?

  • Soyer Marie-Hélène
    • 4 posts
    December 1, 2020 10:11 AM EST

    Hi Trish,

     

    You are so kind.

    I try to ask that to them but they don't reply!

    I try again.

    My copper is CUC1, very clean.

     

    Thanks