Color Fastness Test Calculator

Expected color retention from dye type and care method.

Dye type

Wash temperature (°C)

Wash cycles completed

Sun exposure (hrs/week)

Bleach type used

Tab to move between fields

Wash fastness (1-5)

4.1

Light fastness (1-5)3.8

Rub fastness (1-5)3.9

Color retention (%)79

Washes until noticeable fade88

Max safe wash temp (°C)50

Color bleeding risk (%)18

How to Use This Calculator

How the result changes with Wash temperature (°C)

Dye type: 0=Reactive (cotton), 1=Vat/indigo (denim), 2=Acid (wool/silk), 3=Disperse (polyester), 4=Direct (cheap cotton), 5=Natural, 6=Pigment print.
Wash temperature (°C): Temperature of water used for washing.
Wash cycles completed: Total number of times the garment has been washed.
Sun exposure (hrs/week): Average hours per week the garment is exposed to direct sunlight (including line drying).
Bleach type used: 0=No bleach, 1=Oxygen/color-safe bleach, 2=Chlorine bleach.

Wash fastness (1-5): Grey Scale rating for wash fastness. 5=excellent, 3=acceptable, 1=poor.
Light fastness (1-5): Resistance to fading from light/UV exposure.
Rub fastness (1-5): Resistance to color transfer from rubbing (crocking).
Color retention (%): Overall percentage of original color remaining.
Washes until noticeable fade: Estimated additional washes before color fading becomes visually obvious.
Max safe wash temp (°C): Maximum recommended wash temperature for this dye type.
Color bleeding risk (%): Risk of this garment bleeding color onto other items in the wash.

Identify Input Parameters
4 parameters
Dye type = 0, Wash temperature (°C) = 40, Wash cycles completed = 20, Sun exposure (hrs/week) = 2 = 5 input(s) provided
Calculate Wash fastness
Wash fastness
4.1 = 4.1
Calculate Light fastness
Light fastness
3.8 = 3.8
Calculate Rub fastness
Rub fastness
3.9 = 3.9