In addition to the Sto Studio design services and the Sto Color Lab which we’ve described in previous blogs, the Sto Tint School is yet another asset that helps differentiate Sto Corp. in the building materials marketplace today.  At Sto, consistent material selection and consistent formulation results in consistent color and a superior product; at the Sto Tint School they strive to ensure quality customer service to support the tinted product.

At the Tint School in Atlanta, Sto employees and distributors are trained to be coating and finish specialists. There, they are schooled in the art and science of color, including an overview of color theory. This includes a primer on hue, chroma, and lightness (the attributes of every color) and an introduction to color creation based on the color wheel with its three primary colors of red, yellow and blue.

Students learn the elementary basics of color: Colors next to each other on the color wheel are referred to as harmonious; colors directly across from each other on the wheel (such as red and green) are called complementary. Mix two primary colors and you get a secondary color (red & yellow = orange; blue & yellow=green); mix a primary and a secondary color, you get what’s called an “intermediate” color.

The school also provides a primer on colorant — teaching, for instance, the differences between inorganic and organic colorant.

Inorganic Colorant

  • Excellent light fastness characteristics
  • Large particle size, tends to be opaque
  • Lower tinting strength
  • Lower cost per pound
  • Generally low in chromaticity

Organic Colorant

  • May “fade” sooner than a color produced exclusively with inorganic colorants
  • Is dye-like with smaller particle size and tends to be transparent
  • Higher tinting strength
  • Higher cost per pound
  • Tends to be bright, high in chroma

Made from raw materials and carefully tested before being distributed, Sto colorant is optimally formulated for use in water-based products and is generally stronger than other colorants used in the coatings market. A high-quality colorant is utilized for exterior use where UV resistance is required.

Tint School students learn that if a color needs to be a shade darker, you don’t add black; you add all the colorants in the formula in equal proportions. They learn the importance of matching a color standard, and that to do so they need to provide a clean color chart sample versus a popsicle stick dipped in material or paint smeared thinly on a piece of cardboard. They learn that appearance characteristics such as gloss, texture, and sheen make a color “look” different and that these characteristics cannot be altered with colorant.

Sto Tint School graduates become color experts who can tackle any issue involving color, providing smart, educated guidance to their partners in the building profession. It’s about understanding color and Sto’s products, but it’s also about the equipment and production of these products. So next week we’ll be discussing basic dispenser/jet mixer maintenance and calibration, and other important topics also covered at the Tint School.