Resin Pigment Dosage Calculator – Online Drops per Oz

For most pigment pastes, use 3–8 drops per ounce of resin for a semi-opaque finish. For translucent effects, reduce to 1–3 drops/oz. For full opacity, use 8–14 drops/oz. Alcohol inks are more concentrated — typically 1–5 drops/oz depending on desired intensity. Mica powder is measured by weight: 0.5–2 grams per ounce is standard. Always check your specific brand's recommendations, as pigment concentration varies significantly between manufacturers.

Adding too much pigment can cause several issues: incomplete curing (resin remains tacky or soft), weakened structural integrity, excessive bubbling, uneven color distribution, and longer cure times. Most resin systems tolerate up to 6–10% pigment by weight, but exceeding this threshold disrupts the chemical reaction between resin and hardener. For best results, stay within 2–6% for pigment pastes and never exceed the manufacturer's maximum pigment load.

Pigment paste is a thick, opaque colorant that provides rich, solid colors and excellent coverage. It's ideal for creating bold, uniform pieces. Alcohol ink is fluid, transparent, and creates stunning organic effects like petri dishes, blooms, and wispy patterns. Alcohol inks can interact with resin to produce unique cell formations. Pigment paste gives predictable, consistent color; alcohol inks offer artistic, unpredictable effects. Many artists use both — pigment paste for base colors and alcohol inks for decorative effects.

For a subtle shimmer, use 0.3–0.8 grams of mica powder per ounce of resin. For a noticeable pearlescent effect, use 0.8–2 g/oz. For intense, opaque shimmer, use 2–4 g/oz. As a rough guide, 1 level teaspoon of mica powder weighs approximately 2.5–3 grams. Mica powder disperses best when mixed with a small amount of resin first to create a smooth paste, then blended into the main batch. Unlike liquid pigments, mica doesn't affect resin viscosity as significantly.

Yes, you can combine pigment types — for example, adding mica powder for shimmer plus a small amount of pigment paste for base color. However, keep track of the total pigment load. If you're using 2 g/oz of mica powder plus 4 drops/oz of pigment paste, you're approaching the upper limit of what resin can accept. Stay within the combined equivalent of 6–8% total pigment by weight. Also note that some alcohol inks may react differently when mixed with other pigment types — always test combinations on a small scale first.

For batches under 2 ounces, precision is challenging. Use fine-tip droppers or micro measuring spoons (1/64 tsp ≈ 0.08 ml). For mica powder, a jewelry scale that measures to 0.01g is ideal. Start with half the calculated amount, mix thoroughly, and add more gradually. It's easier to add pigment than to compensate for over-pigmented resin. For UV resin projects (often under 0.5 oz), use toothpick tips to transfer tiny amounts of pigment — a single toothpick tip holds roughly 0.01–0.02 ml of paste.

Yes, pigments can affect curing. Excessive pigment (especially pastes and acrylics) can slow down or even prevent proper curing. Alcohol inks contain solvents that may accelerate curing slightly in small amounts but cause issues in larger quantities. Mica powder generally has minimal impact on cure time. Environmental factors like temperature and humidity also interact with pigmented resin differently than clear resin. Always allow pigmented pieces the full recommended cure time, and avoid demolding early even if the surface feels hard.