ALLERGY TO PARABEN AND TATOO

Hi everybody! I'm allergic to Cobalt and Paraben (a preservative mainly used in cosmetics and make-up, there are several names: ethylparaben, buthylparaben, isobutylparaben, etc...). I would like to get a second tatoo but I don't know if it's safe to do it because I can't find any informations about the preservatives used in Inks. I got my first tatoo before the allergie and it healed perfectly. Now I've asked my dermatologist and my tatooist but they can't give me any good answers as there' no french low forcing manufacturers to tell what are in the Inks. If anyone has an idea or information it would be realy great. HELLLLP!!!! PS: sorry for the mistakes, I'm French!