by Nutso » Tue Oct 11, 2016 11:36 am
You can achieve similar effects by coloring multiple batches of resin ahead of time. Usually longer pot life resins are used.
Mix the color tint into the the recommended A or B portion of your chosen resin. Make sure you take the added volume or weight of the color tint into consideration when mixing the A and B portions later according to the manufacturer's guidelines.
Mix the A and B for each color you want to choose and select your base color. Pour your base color into the mold but do not fill it entirely. Now pour each accent color into your mold. Thinner streams and swirls when pouring will provide different effects. A small stirring stick can be used to add additional patterns.
It appears that these items might have been cast into "blank" molds and then sanded/polished down to the final shape. Getting colors to the very edge of the mold, especially those very thin streams would be difficult otherwise.