Do you like sultanas (golden raisins) ?

I think they taste gross and last weekend I learned another reason to not eat them.
I had a chat with a grape farmer who makes raisins and sultanas and exports them.
According to him, and he asked me to keep this hush hush, he treats sultanas with extra amounts of sulphur dioxide to keep them light in colour.
Apparently all raisins are treated with it but sultanas receive extra doses.
No wonder they taste terrible ! Yuck ! 🤢