This bundle includes every current Tonic Watercolor, for a total of 15 tubes. Tonic is made right here in our St. Louis HQ, with a unique formula that we developed over two years of experimentation and research. We designed Tonic for maximum pigmentation, and you'll notice that a pan of Tonic is more concentrated than many other artist-grade watercolors.

Tonic Watercolor is made right here in our St. Louis HQ, with a unique formula that we developed over two years of experimentation and research. We designed Tonic for maximum pigmentation, and you'll notice that a pan of Tonic is more concentrated than many other artist-grade watercolors.

With just a few drops of water, you can make bold, saturated marks on wet or dry paper. To make typical, translucent watercolor washes, you'll need to add more water than you might expect. Most Tonic colors start out semi-opaque because of their high pigment load, but they open up with water, becoming light and subtle as they're diluted.

At any concentration, Tonic is free-flowing. It's easy to load onto a wet brush, easy to lift from its pan or from paper, and easy to move the brush across watercolor paper. Some brands of watercolor are too sticky or slow-moving to allow painting on dry paper, but with Tonic, you don't need to pre-wet the page for most techniques.

All Tonic colors are lightfast, with ratings of 7 or 8 on the eight-point Blue Wool Scale. Paintings made with Tonic colors are suitable for commissioned work and for long-term display under appropriate gallery conditions.

We put each Tonic color through extensive testing to ensure that the consistency of each dispersion is perfect. That means that each tiny particle of pigment is surrounded by the watercolor medium. Tonic Watercolor is completely free of clumps and inconsistent pigment dispersion—unlike handmade watercolors, which can't achieve the same consistency, and even some cheaper factory-made colors.

Our process for achieving these professional-grade results involves several stages of mixing, milling, and quality checking. First, we use a dispersing blade to pre-mix each color with medium. The pre-mix can take quite some time, because we use such high concentrations of pigment. But when it's done, the paint is a smooth paste without major clumps.

After the pre-mix, we use a three-roll mill to fully disperse the pigment and break up any clumps that are invisible to the naked eye. Each time the paint passes through the mill, it is pushed with incredible force through a tiny gap, generally measuring less than 50 microns (0.05 mm). The shearing force breaks the bonds between nearby pigment particles and turns the paste into a luxuriously smooth, free-flowing watercolor paint.

Three passes through the mill are required to make Tonic silky smooth. This labor-intensive process requires considerable skill from our mill operators, who ensure that each batch meets our exacting standards.

Hand-filled in St. Louis, our aluminum tubes are the most direct way to put Tonic on paper. Professional painters often prefer tubes, because they offer excellent control of the crucial pigment/water ratio. You can paint with Tonic tubes full-strength for intense, dark, semi-opaque color, or dab just a touch on your palette for bright, clear washes.

Federal Color aluminum tubes have wide, octagonal caps for easy opening, even if you get paint on the threads. They come in a cardboard box for protection and storage. 12 mL (0.4 oz.) per tube.