Finest Professional Watercolours Quality Control Process

Jackman's Art Materials Watercolour Quality Control

Jackman’s Art Materials Watercolour Quality Control Process

At Jackman’s Art Materials, we are dedicated to producing the finest professional watercolours. Each batch undergoes a rigorous quality control process to ensure consistency, performance, and artist-grade quality. Here's an overview of the testing stages involved:

1. Fineness of Grind

We use a Hegman Gauge to measure the fineness of pigment grind after milling. This precision instrument features a graduated trench that helps us determine the size of pigment particles in microns. A smooth, even finish ensures optimal colour flow and application.

French Ultramarine Fineness of Grind Test

2. Density Testing

Using a density cup, we verify that each paint’s density matches previous batches. Maintaining consistent density ensures the paints perform reliably with every use.

3. Colour Swatching

We hand-test every batch by painting swatches on various watercolour papers. These swatches are washed down with different water-to-paint ratios to reveal tonal range and transparency. Our experienced chemist visually compares new samples against previous batches for accuracy and consistency.

Watercolour Swatches

4. Drying & Rewetting Tests

We test drying performance by applying samples to paper and allowing them to dry for two weeks in a humidity-controlled room. This reveals any potential cracking and allows us to assess rewetting ability and paint performance when layered wet-on-wet or dry-on-wet.