Mixing Pigments in Epoxy Resin for Jewelry Without One Ratio

Mixing pigments in epoxy resin for jewelry-scale pours

Mixing pigments in epoxy resin for jewelry-scale pours means dosing a concentrated, resin-safe colorant after you already know the epoxy system's mix ratio. Disperse the colorant until it vanishes. Scrape the cup as you go.

Published percentages are overlapping starting ranges, not a jewelry standard for this kind of work. The aim on pendants, bezels, cabochons, and other small handmade pieces is even color, a chosen finish (clear, opaque, or shimmer), and a reliable cure.

How much pigment belongs in one jewelry cup?

Guides disagree on both the number and the unit. You start tiny. Mix until nothing sits on the wall, then test before the real mold.

What "mixing pigments in epoxy resin" means in practice

In a jewelry cup, mixed color is a physical state you can actually see in the liquid, not a guess you make after the pour has already gone into the bezel. You check the cup first.

You add a resin-safe colorant to a correctly measured epoxy system. Keep the first addition small. Stir until the paste, powder, or dye is broken apart. There should be no dry pockets in the liquid and no pigmented sludge left on the wall.

Unmixed material on the cup later becomes a streak, so you keep stirring until fully mixed color looks even in the cup before it ever hits a bezel, scraping as you go because a ring of sludge is the thing that ruins a pendant later.

Turns out published loads do not agree, and they do not even share a unit. Some manufacturer language sits around 1-5% pigment by volume. A jewellery-inclusive reference of about 2.5% pigment by epoxy volume shows up in Magic Resin's pigment and mica guide, while liquid dyes are often discussed around 1-3% by weight.

Pigment pastes are often started around 2-3% by weight, and one described practice uses about 3% paste by volume. One 2026 pigments and dyes guide cites a ceiling near 5-6% by weight. Another mixing article talks about 5-10% of the total resin mixture.

Volume, weight, and "percent of mixture" are not the same instruction. None of those figures is a jewelry standard. Do not collapse them into one "correct" load.

Use concentrated products and add a tiny first dose, then increase slowly while you stay under the pigment maker's stated maximum. Wet resin may look about 20-30% darker than the cured piece, according to that same 2026 pigments guide. Treat that as a visual caveat, not a measuring rule.

Jewelry-cup workflow: measure, disperse, scrape, then pour

A pendant does not need a gallon recipe, so work small and measure only what the mold will actually take. Follow the kit, not a forum fight.

Guides also disagree on sequence: some mix Part A and Part B fully, then add colorant, while others put pigment into Part A every time, before hardener. Do not pick a winner from the internet. Follow the resin and pigment instructions in your kit.

Temperature changes how the cup behaves. In cooler conditions, resin thickens, pours slowly, traps more bubbles, and can cure poorly. In warmer conditions, pot life shortens.

One epoxy volume calculator lists a 1:1 ratio for some jewelry and casting systems. That 1:1 listing is not universal. Read the label on the bottles you actually opened.

1. Gather clear resin, hardener, colorant, cups, sticks, and molds.
2. Measure the epoxy system at the ratio on the label.
3. Scrape the sides and bottom while you mix, using the colorant sequence on your labels.
4. Add colorant gradually, in the order your products specify.
5. Stir until no dry pockets or sludge remain on the wall.
6. Test a scrap cup before the real mold.
7. Record the mix so you can match it later.

Scrape again right before you pour. Clear resin hiding on the rim can show up in the casting.

Starting amounts by colorant type (ranges, not a formula)

Pick the first dose by the form in your hand. Do not hunt one percentage.

Liquid dyes are often discussed around 1-3% by weight. They are drop-friendly. A little still goes far.

Thing is, pigment pastes are highly concentrated, so you start tiny, often around 2-3% by weight, and increase slowly. One described practice uses about 3% paste by volume. You add a bit, stir, then decide if you need more.

Mica is the jewelry shimmer option, and a 2026 Epoxy Guide pigments write-up uses 1.5-2% by weight for a thin topcoat shimmer layer, which is a cue for a thin layer, not a license to dump powder into a deep bezel. Alcohol ink can start at 1-2 small drops per mixing cup, stirred well.

Powders are generally more pigment-dense per gram than liquids, so the same opacity often needs less powder weight. A gram of powder is not a gram of dye.

Keep every figure labeled as a manufacturer or practice range. Stay under the pigment maker's maximum. Do not treat any cited cap as proof that a heavier load is safe.

Powder, liquid, paste, mica, or alcohol ink - choose by finish

Finish should pick the colorant. Rankings will not.

Form	Typical jewelry effect	Mixing / measuring character	Cautious starting cue
Mica / powder	Pearlescence, metallic shimmer; semi-opaque to opaque	Sits in the resin; weighed or pinched in tiny amounts	Thin-layer shimmer around 1.5-2% by weight; powders often need less weight than liquids for similar opacity
Liquid dyes	Some stay glassy-transparent; some go opaque	Fast blend; easy to count in drops	Often discussed around 1-3% by weight
Pigment paste	Dense, saturated color built in small steps	Highly concentrated; add, stir, then add again	Start tiny / around 2-3% by weight (one practice ~3% by volume)
Alcohol ink	Strong tint from very little liquid	Dropwise; stir thoroughly	1-2 small drops per mixing cup
Effect powders (glow, chameleon, neon, glitter)	Special-effect category, separate from plain color	Treated as their own family; still need full dispersion	Follow that product's maximum; test a scrap cup first

RESINPRO frames the real differences as transparency, ease of mixing, stability, and final effect. Choose mica when you want pearlescence or iridescence. Choose dyes labeled crystal clear or non-settling when stacked transparent layers matter. Use concentrated, resin-safe products only.

Neither powder nor liquid is automatically better. Powder often gives more control over shimmer and opacity. Liquid is usually easier to measure by drops. Project size, finish, cure reliability, and whether you can repeat the color all matter more than the form's reputation.

Streaks, sludge, and unfinished dispersion

Uneven color often starts as a mixing failure in the cup, before the mold. Blotchy metallic or flow effects usually mean the pigment was not fully broken apart.

In the Part-A-first school, that breakdown happens before hardener goes in. If you mixed A and B first, blotches usually mean the colorant never fully moved through the mixed resin. Incure Lab describes splotches as a mixing breakdown, not a bad batch of colorant.

Unscraped walls leave two problems:

• Clear resin clings in a film.
• Pigmented sludge sits in a ring.

Both can later enter the pour as a streak. Stir the bottom. Scrape the sides. Check the stick.

If you still see a ribbon of uncolored resin, you are not done. Stay on prevention for small castings. To be honest, do not pour a streaky cup and hope the bezel hides it.

Test cups, notes, and the next colored layer

Keep the first colored pour tiny. Always run a small test pour for saturation, cure behavior, and surface finish before you scale up.

Confirm you are coloring epoxy, not a UV system you never checked, and that the colorant is not supposed to block cure. Most pigments are formulated not to interfere. Instructions plus a test still win, as Reality Pathing and other craft write-ups stress when they tell you to experiment on scrap and record the mix.

Write down what you used. Ratio of A to B. Colorant form. Approximate amount. Cup size. Room temperature if you noticed it. You will want that scrap of paper the next time you need to match the same color.

Typical full-cure windows are cited around 24-72 hours and depend on the product. Chemical recoat while the previous layer is still tacky is often described around 8-16 hours. That window varies with system, temperature, and thickness. Check the datasheet. The datasheet beats a copied timetable every time.

Start tiny, scrape fully, test a scrap cup, write down the mix, and follow the product's maximum and cure window. Mix the next jewelry cup the same way you mixed the one that already cured clean.

FAQ

Is there one correct pigment percentage? No. Estimates vary by unit and by product. You will see about 1-5% by volume, a jewellery-inclusive reference of about 2.5% pigment by epoxy volume, liquid dyes often at 1-3% by weight, pastes often started around 2-3% by weight, one ceiling near 5-6% by weight, and another figure of 5-10% of the total resin mixture. Treat them as overlapping starting ranges. Follow the pigment maker's maximum.

Should colorant go in before or after hardener? Guides conflict. Some mix Part A and Part B fully, then add colorant. Others put pigment into Part A every time, before hardener. Use the sequence on your resin and pigment instructions.

Why does wet color look darker? One 2026 pigments guide notes that wet resin may look about 20-30% darker than cured resin. It is a visual caveat. It is not a dosing formula. Judge saturation on a cured test chip.

Can I use the same colorant in epoxy and UV? Not by assumption. Verify the resin category and that the colorant is meant for that system. Most pigments are made not to block cure, but a small test pour still decides.

How soon can I pour another colored layer? Full cure is often cited around 24-72 hours and is product-dependent. A tacky chemical recoat is often described around 8-16 hours and shifts with system, temperature, and thickness. Read the datasheet for the bottles on your bench.

Mix one scrap cup today with a tiny first addition, a full scrape, and notes you can read tomorrow. Pour the real bezel only after that chip cures the way you want.