Quick facts

Purpose
Document an appearance-consistency question
Not included
No dosage or mixing instructions
Useful records
Component, base system, colour reference, batch and conditions

Treat colour variation as a material-system question

When an FRP product appears uneven in colour, the useful first step is to document the question rather than assume a single cause. Colour appearance can involve the selected component, base resin or gelcoat system, colour requirement, material history and production conditions. This page does not diagnose or prescribe a correction.

The FRP Polyester Pigment page can be part of the review, but a pigment product should not be assessed in isolation from the actual resin or gelcoat system.

Record what the finished component was meant to look like

Keep the intended component, colour reference or approved appearance description, whether the surface is visible, and the base product under review. If the enquiry concerns a panel, tank, moulded part or gelcoat surface, identify that component precisely. A general request for 'better pigment dispersion' does not provide enough product context for a reliable discussion.

Keep the material and production record together

Where available, retain the product identity, batch or container record, receipt date, storage history, component record and any photographs that fairly show the issue. These details support a factual conversation without asserting that any one material or process variable caused the appearance difference.

Know when to discuss the base material as well

If the visible appearance relates to a surface-finish requirement, review the relevant Gelcoat product role. If it relates to the bulk FRP component, identify the actual resin system under review. The aim is to ensure the colour discussion, base-material discussion and finished-product requirement are evaluated together.

Frequently asked questions

Does uneven colour always mean there is a pigment defect?

No. This guide does not diagnose a cause. An appearance question should be reviewed against the specific base system, component, colour requirement, material records and production context.

Does this guide provide a mixing or dosage correction?

No. It deliberately avoids product-use instructions. Use the current product data and seek technical review for the actual material system.