Setting New Standards in Wool Measurement

Services | Greasy & Scoured Wool

Colour Measurement
(IWTO 56)

Wool is measured for its colour to assist the buyer in the purchase decision making process. Like fibre diameter, colour is an important wool attribute and the measurement assists the dyer when the wool is being processed. If a very light pastel colour is required the wool must be very white and bright. On the other hand, if dark colours are to be dyed, stained and dingy wool could successfully be used.

N.B. Colour results are only valid for 6 months after testing; any IWTO Test Certificate or Test Report issued with a colour result older than 6 months will include the wording "Colour readings expired".

As a guide:

Brightness (Y)
  D65/10 C/2
Very Bright > 70 > 66
Bright 68 - 70 64 - 66
Average 64 - 68 60 - 64
Slightly Dingy 59 - 64 56 - 60
Dingy < 59 < 56
Yellowness (Y-Z)
  D65/10 C/2
Very White < 9 <- 2
White 9 - 10.5 -2 - 0
Slightly Creamy 10.5 - 12.5 0 - 3
Creamy 12.5 - 14.5 3 - 6
Quite Yellow 14.5 - 16 6 - 8
Heavily Stained/Yellow > 16 > 8