Common Liquid Pigment Mistakes in Resin and How to Avoid Them

Liquid pigments make it easy to add colour gradually, but that convenience can encourage guesswork. An extra squeeze, a contaminated nozzle or an unrecorded blend may change the final result. The best way to achieve repeatable colour is to treat pigment as a measured part of the process, not a last-minute flourish.

Choosing colour without checking compatibility

A bottle of liquid colour is not automatically suitable for every resin. Products may be described for particular resin families, effects or applications, and compatibility should be checked before anything is added.

When browsing the Liquid Pigments collection, read the current description for both the pigment and your resin system. Confirm that the colourant is intended for the material and project. If the information is unclear, ask the supplier or make a small, appropriate test rather than risking a full batch.

Do not substitute paint, ink, food colouring or another household liquid simply because its shade looks right. An unsuitable addition may contain ingredients that affect the mixture or introduce unwanted moisture. Use products supported for the intended application and stay within their guidance.

Expecting the bottle colour to match the casting

Colour viewed through a container may look darker, brighter or more opaque than it will in resin. The appearance can also change with casting thickness, the colour of the background, inclusions and the resin itself.

Assess the type of effect as well as the shade. A translucent dye, metallic colour and pearl effect are different starting points. For example, compare the current descriptions for the Resin Studio Metallic Pigment Colour Set and other finishes rather than assuming that similarly named colours will behave alike.

Make a sample using the same resin, mould depth and background conditions planned for the finished piece. Label it in your records with the products and measured quantities used. A useful sample library is based on known recipes, not colour names alone.

Adding pigment before planning the batch

Once resin components have been combined, there may be limited time for indecision. Opening bottles, searching for a spare cup and debating colour proportions during the mix makes mistakes more likely.

Plan the palette before measuring the resin. Decide how many colours are needed, how the main batch will be divided and which tools belong to each cup. Put every pigment, cup and stirring tool in its intended place before beginning.

Prepare a simple colour station

• Keep unopened and clean pigments on one side.
• Prepare a separate cup and stirring tool for every colour.
• Place used pipettes and contaminated tools in a designated area.
• Keep the batch record within sight but away from splashes.
• Protect the work surface as directed for the materials.
• Follow the resin and pigment manufacturers’ handling and protective-equipment guidance.

This arrangement reduces the chance of touching clean bottles with contaminated gloves or moving one colour tool into another mixture.

Adding too much colour at once

A large initial addition is difficult to reverse. More pigment does not necessarily create a better colour, and excessive additions may take the mixture outside the manufacturer’s recommended limits.

Start cautiously and add colour in measured stages, following the guidance for the pigment and resin. Mix thoroughly enough to assess the shade before adding more. Remember that colour in a deep cup may appear stronger than the same mixture spread through a shallow mould.

A broad selection such as the 24-colour Epoxy Resin Pigment Set in 5ml bottles can support colour experiments, but having many options makes record-keeping more important. Note the exact colour or colours chosen rather than writing only “blue” or “pink”.

Counting drops as though they are perfectly consistent

Drop counting is convenient, but drops can vary with the nozzle, liquid consistency, bottle angle and pressure applied. A partly blocked opening can make the next drop very different from the last.

If repeatability matters, use an appropriate measuring method supported by the product instructions. Record the resin quantity as well as the pigment amount; five drops in a small batch will not create the same proportion in a much larger one.

When a maker sells matching sets or repeat colourways, vague notes such as “a little green” are not enough. Record a proper recipe and use the same equipment and sequence where practical.

Contaminating the pigment bottle

Touching the nozzle with a resin-coated tool can transfer material into or around the bottle. Contaminated gloves may also spread uncured resin onto caps and neighbouring containers.

Dispense the pigment without allowing the nozzle to touch the cup, stick or mixture. If a separate pipette or spoon is used, it should be clean and suitable for the pigment. Do not return unused dispensed colour to the original bottle.

Replace the cap as directed and keep the exterior clean using only an approved method. Store the product according to its current instructions rather than leaving open bottles beside the active pour.

Using the same tool for several colours

A small trace of a strong shade can muddy a pale mixture. Metallic or pearl material transferred on a stirring stick may also alter a colour that was intended to remain plain.

Assign one clean tool to each colour cup. If colours will be combined deliberately, transfer measured amounts with separate clean tools before using another tool for the final blend. This keeps the source bottles and individual mixtures easier to control.

Use a clear system when several makers share a studio. Cups can be placed in a fixed order, while notes identify each recipe. Never rely entirely on memory once multiple similar shades are on the bench.

Mixing colour unevenly

A few turns near the centre of the cup may leave concentrated pigment along the sides or base. These streaks can appear in the casting even when the surface of the mixture looks uniform.

Follow the resin manufacturer’s mixing instructions and use a tool suited to the cup. Work through the full mixture with controlled movements, reaching the areas specified in the guidance without whipping or splashing.

Some pigments may have their own preparation instructions. Do not automatically shake, warm or stir a bottle unless its manufacturer directs you to do so. Treat advice for one product as product-specific rather than universal.

Trying to correct a muddy blend with more pigment

Adding several colours without a plan can produce an unclear or dull result. Pouring in more of the brightest shade may deepen the problem instead of restoring the intended colour.

Build blends in small, recorded steps. For each adjustment, mix fully and assess the result under consistent lighting. If the blend has moved too far from the goal, retain it for a suitable separate use and begin a fresh controlled sample rather than adding indefinitely.

Sets with distinct effects, such as the Resin Studio Pearl Pigment Colour Set, should be assessed under the lighting and casting depth relevant to the project. A visual effect seen in the mixing cup may appear different once cast.

Ignoring the influence of mould depth

The same pigmented mixture can look different across thin and thick sections. Transparent or translucent colours are particularly affected by the amount of material through which light travels, but every colour should be evaluated in the intended design.

Test samples should therefore resemble the final casting rather than being an unrelated thin smear. If a mould contains areas of different depth, expect them to show the colour differently and use that variation deliberately.

Changing too many variables between batches

If a colour is inconsistent, changing the resin quantity, pigment amount, mixing cup, lighting and mould depth at once will not reveal the cause.

Return to your batch record and compare like with like. Keep the resin ratio and manufacturer’s instructions unchanged, then adjust one controllable colour variable at a time. Record:

• the exact resin and pigment products;
• the resin batch quantity;
• the measured pigment amount;
• the order in which colours were added;
• the mould and approximate casting depth;
• the result once it was ready for assessment.

Storing pigment without checking the bottle

A loose cap, marked nozzle or contaminated exterior can cause problems at the next session. Before storing liquid pigments, inspect each container and follow its instructions for closing, cleaning and storage.

Keep bottles identifiable and do not decant them into unlabelled containers. Store them away from areas where they may be knocked over or confused with unrelated liquids. Check older colours before planning a repeat batch rather than assuming they remain unchanged.

Consistent colour comes from measured decisions

Liquid pigments are easiest to control when compatibility, quantity and process are decided in advance. Add colour gradually, keep tools separate and prevent resin from reaching the bottles. Most importantly, record recipes against the actual resin quantity and casting design. That turns a pleasing one-off shade into a result you have a realistic chance of repeating.