Jackman's Art Materials Blog

French Ultramarine vs. Ultramarine Blue (Green Shade): What’s the Difference? Ultramarine is a staple in many artist palettes—but did you know there’s more than one kind? Two of the most common variations are French Ultramarine and Ultramarine Blue (Green Shade). Though both are made from the same pigment, PB29 (Sodium Sulfosilicate), their differences in tone and behavior can have a significant impact on your artwork. Here's what you need to know to choose the right one for your palette. Same Pigment, Different Hue Both paints are made from the same pigment, PB29, but they are manufactured or processed differently to...

Watercolour Painting Techniques | Jackman’s Art Materials Mastering Watercolour Painting Techniques: A Guide for Beginners and Beyond Watercolour is often praised for its ethereal beauty, transparency, and the way it seems to dance across paper. But behind that fluid elegance is a toolkit of versatile techniques that every watercolourist—whether beginner or professional—should explore. From controlled washes to expressive textures, learning these core techniques will help you unlock the full potential of your paints. Whether you’re just picking up a brush or refining your skills, this guide breaks down the most essential watercolour techniques and how to use them in your...

What Is California Proposition 65? Understanding Prop 65 Warnings on Art Materials If you’ve ever seen a label on your art supplies stating something like “This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm,” you’ve encountered a Proposition 65 warning. But what exactly is Prop 65, and what does it mean for artists? What Is Proposition 65? California Proposition 65, officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986, is a law that requires businesses to provide clear warnings if their products expose consumers to...

Watercolour painting is one of the oldest artistic traditions in the world, with roots reaching back to prehistoric cave art. Early humans ground earth pigments into powders and mixed them with water, plant sap, or animal fat to create rudimentary paints, using these to decorate the walls of caves such as those at Lascaux in France.

Understanding Colour Theory in Art: A Guide for Artists Colour is one of the most powerful tools in an artist’s toolkit. Whether you’re painting landscapes, abstracts, or portraits, understanding colour theory can elevate your work, helping you create emotion, harmony, contrast, and depth. This guide explores the fundamentals of colour theory and how to apply it in your art practice. What Is Colour Theory? Colour theory is the science and art of using colour. It explains how colours interact, how they can be combined harmoniously, and how they affect mood and composition. Rooted in centuries of artistic and scientific study,...