FORM - 2 THE PATENTS ACT, 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10 and Rule 13) FABRIC WHITENESS GUIDE HINDUSTAN UNILEVER LIMITED, a company incorporated under the Indian Companies Act, 1913 and having its registered office at 165/166, Backbay Reclamation, Mumbai -400 020, Maharashtra, India The following specification particularly describes the invention and the manner in which it is to be performed Fabric Whiteness Guide The present invention concerns a fabric whiteness guide for monitoring whiteness of a fabric. 5 In many circumstances, whiteness is extremely valuable to consumers. Indeed, for some garments (e.g. expensive white suit shirts, uniforms) off-whites are perceived as unacceptable. In these cases, reduced whiteness may even 10 result in the garment being discarded by the consumer. Repeated wash-wear cycles can reduce the whiteness of a garment. The ability of washing powders to maintain/rejuvenate 15 whiteness may be increased by the use of shading dyes. An objective is to provide a device and method for in-home consumer monitoring of the changes in whiteness of fabric and evaluation of the whiteness benefits of a laundry 20 composition. Accordingly, in a first aspect, the present invention provides a fabric whiteness guide comprising at least one visual scale of whiteness. 25 The fabric whiteness guide allows in-home consumer monitoring of the change in whiteness of a fabric by matching the shade of the fabric with the whiteness shade displayed visually on the scale, without the need for 30 complicated equipment or training. WO 2008/064977 PCT/EP2007/061972 The scale (s) may display a whiteness range varying progressively from low whiteness at one end of the scale to high whiteness at the other end of the scale. 5 A whiteness Scale (s) may be defined in terms of L*a*b* values (the CIE LAB colour space, (CIE 1976 L* a* b*), where L* is the lightness value, a* is the red-green value and b* is the yellow-blue value. 10 The variation in whiteness on the scale, may be due to a combination of a change in lightness