Processing times vary by formula but commonly range from about 20 to 35 minutes.
Dark red shades are available as permanent, demi-permanent, semi-permanent, and gloss/toning options.
Semi-permanent red colors commonly last about 25 to 45 washes, while gloss/toning treatments are typically described as lasting around four weeks.
Some dark red options are direct dyes that apply straight from the tube with no developer required, while permanent professional formulas require mixing with a developer for permanent results.
Typical shade descriptions include copper red; merlot/deep burgundy; blazing hot red; dark intense red-brown; dark red-brown; cranberry/red gloss; and general dark red shades.
Common net weights include 3 oz and 4 oz tubes, 4 fl oz and 6.3 fl oz kits or bottles, and larger gloss treatments up to about 10.1 oz.