Head for an oral care implement and oral care implement

A head (10, 11) for an oral care implement, the head (10, 11) comprising a number of colored filaments of different types (18, 20, 22), the filaments (18, 20, 22) extending from a mounting surface (16) of the head (10, 11) and being grouped together to define a color pattern, the number of colored filaments of different types (18, 20, 22) comprising at least a first type of filament (18) having time-controlled color changing properties, and a second type of filament (20) having time-controlled color changing properties, so that each of the first and second type of filament (18, 20) changes its color from an initial color to a second color within a pre-defined time period,

• the initial color of the first and second type of filament (18, 20) defining an initial color pattern
• C
• ab
• ⁢
• new
• *
• _
• (
• 12
• )
• ,
• the second color of the first and second type of filament (18, 20) defining a second color pattern
• C
• ab
• ⁢
• used
• *
• _
• (
• 14
• )
• ,
• the change from the initial color pattern (12) to the second color pattern (14) being defined by a difference in value of colorfulness
• Δ
• ⁢
• C
• a
• ⁢
• b
• *
• _
• =
• C
• ab
• ⁢
• new
• *
• _
• -
• C
• ab
• ⁢
• used
• *
• _
• ,
• wherein the change in value of colorfulness
• Δ
• ⁢
• C
• a
• ⁢
• b
• *
• _
• is at least 5 in response to use and wear.