Grey Scales Grey Scales To asses the change in colour and staining. Roaches machines meet specifications set by leading retailers such as: Packs Available ISO AO2 Grey Scale (Change in Colour) – Code: 2000-0001 ISO AO3 Grey Scale (Staining) – Code: 2000-0002 AATCC Grey Scale (Change in Color) – Code: 2000-0066 AATCC Grey Scale (Staining) – Code: 2000-0067 Call Today +44 (0)1924 420083 Call Today Previous Next Call Today +44 (0)1924 420083 Send A Message Call Today Send A Message