Lead Free Stained Glass Solder Problem

I have a Weller 80 soldering iron. I have been working with it on several stained glass projects, with lead 60/40 solder and standard soldering flux and

BIG BAD SOLDER - YOU TOO CAN SOLDER LIKE A PRO – Colorado Glass Works

0.125 Low Temperature Solder Wire for Stained Glass (Lead-Free)

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Mastercraft Lead-Free Solder - 1 Lb

Came Around Your Stained Glass Projects: Do You Need It? - Living

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Came Around Your Stained Glass Projects: Do You Need It? - Living

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soldering - What are those black spots in these lead-free solder

Have a question about Oatey Safe Flo 8 oz. Lead-Free Silver Solder

1/2 pound roll of lead-free solder. Perfect for anyone who needs to work in a strictly lead-free environment. This extremely light-weight material is

Canfield Lead Free Solder - 1/2 Lb.

Butterfly or Dragonfly, Lead Free Figurine, DIY Stained Glass