Not sure if this is in the right forum, but………

Does anyone know where to look in order to find studios that use natural ink? I have a very weak immune system and all sorts of intolerances to unnatural and/or processed things. I am looking for ink that is free of toxins and heavy metals. I live in Chicago and have tried to contact many studios about natural ink but many either do not know what is in their inks o where to find what I am looking for, or simply have not responded. If anyone has any information, I would love to hear from you.

Thanks