The Matrix SoColor Pre-Bonded Color Chart is a ring-bound reference binder of hair-color swatches representing the full shade range of Matrix's SoColor Pre-Bonded permanent crème hair color line; it is a consultation tool for colorists, not a tube of hair color or a home coloring kit.
SoColor Pre-Bonded is a professional-use permanent crème color that includes a built-in Bond-Protecting Concentrate, so a colorist mixes it directly with Matrix Cream Developer without adding a separate bonding step. Depending on the specific SoColor Pre-Bonded formula family (natural/warm shades, ultra-lift blondes, reflect tones, or extra-coverage grey shades), the mixing ratio with developer and processing time can differ, and the correct combination is specified on that color product's own packaging rather than on the chart. This chart holds swatches across that shade range so a stylist can hold a physical color sample next to a client's hair, under normal light, and settle on a shade and formula before ever opening a tube of color.
Because it's a display and reference tool, the chart itself contains no hair color, developer, or other chemical product — buying it does not include any SoColor Pre-Bonded color, which is purchased separately by shade as needed for a service.