We haven't experimented with using xanthan gum in non-culinary applications, Ernesto, so we're not sure if it would work to sufficiently thicken your ink. You're welcome to give it a try, mixing it into a small portion of the liquid and then mixing that slurry into the rest of the dye. (This process of incorporation should prevent it from clumping.) Good luck! Kye@KAF

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