A brush used with varnish has been put into a sink, full of water with dishes. The dishes have not come into contact directly with the varnish, but with the varnish diluted in water. Is throwing all away too drastic? Is it enough to wash them normally? Should I wash them with white spirit?
I don't know much about the varnish, just that it's white varnish for wood/metal.
Varnish is usually a mixture of a drying oil, some resin such as pine tar, and a solvent such as turpentine. The drying oil most likely won't kill you. The most commonly used oil, linseed oil, is actually just non-food-grade flax oil by another name.
The Greeks put pine tar in their wine, and it's a tasty treat.
The solvent is a little more troublesome. The pinene in turpentine for example, has a nasty looking chemical structure. However, Solvents, by their liquid nature are pretty easily washed off, epecially when you put plenty of soap in your water.
I'd give the dishes a good washing, and use them without a second thought. I'd also try not to leave a paintbrush in the kitchen sink again.
