There is a product called Red Erase. I'm not really sure if it will work on ink though. It's made for things like grape juice and strawberry stains. I have a feeling it's much like oxy. I would try some oxy, but I don't know how that will be on silk. Sorry, I wish I had some sure fire advice.

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"No one believes more firmly than Comrade Napoleon that all animals are equal. He would be only too happy to let you make your decisions for yourselves. But sometimes you might make the wrong decisions, comrades, and then where should we be?"
- George Orwell Animal Farm