Can I Add A Coloring Agent?

That depends on the chemical nature of the "coloring agent" or "colored liquid" to be added.

We recommend "Iron-based colored oxides" -mostly because these don't interfere with the crystallization curing process too much. (Except for "Prussian Blue", where its extra Nitrogen & Carbon 'Cyano bonds' do interfere a little).

The maximum we recommend is 5 percent (by weight) - any more will weaken your works.

Remember, the effects of any 'embedded color' on a finished piece only rely on the light absorption/diffusion/

Hence, a LOT of 'embedded color' only makes a small surface difference.

Acrylic-based/suspended colors 'will' interfere with Pal Tiya Premium's cured mechanical properties. Specifically reducing its 'impact strength'.