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1. (WO2019030034) HAIR COMPOSITIONS FOR DAMAGE TREATMENT
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CLAIMS

1. A method of protecting hair, preferably the internal protein of hair, from damage caused by ultraviolet light, comprising the step of applying, to the hair, a hair treatment composition comprising a lactone, a disaccharide, an inorganic salt and an organic acid or salt thereof, having a pH in the range of from 3 to 6.5, prior to the application of ultraviolet light to the hair.

2. Method as claimed in claim 1 , wherein the step of applying, to the hair, a hair

treatment composition comprising a lactone, a disaccharide, an inorganic salt and an organic acid or salt thereof, having a pH in the range of from 3 to 6.5, is performed multiple times, preferably from 2 to 50 times.

3. Method as claimed in claim 1 or claim 2, wherein the damage is caused by

exposure to ultraviolet light multiple times.

4. Method as claimed in any preceding claim, wherein the hair treatment composition is a rinse off hair treatment composition, preferably selected from a shampoo, a conditioner and a mask.

5. Method as claimed in claim 4, in which the shampoo and the conditioner are used sequentially or a shampoo and mask sequentially.

6. Method as claimed in any preceding claim, in which the level of organic acid,

preferably lactic acid, in the conditioner or mask is from 0.01 to 1 wt %.

7. Method as claimed in any preceding claim, wherein the lactone is a delta lactone selected from gluconolactone^ galactonolactone, glucuronolactone,

galacturonolactone, gulonolactone, ribonolactone, saccharic acid lactone, pantoyllactone, glucoheptonolactone, mannonolactone, galactoheptonolactone and mixtures thereof.

8. Method as claimed in claim 7, wherein the lactone is gluconolactone.

9. Method as claimed in any preceding claim, wherein the disaccharide comprises of pentose or hexose sugars, more preferably the disaccharide comprises of two hexose units.

Method as claimed in claim 9, wherein the disaccharide is trehalose.

1 1. Method as claimed in any preceding claim, wherein the inorganic salt is sodium sulphate.

12. Method as claimed in any preceding claim, wherein the a hair treatment

composition comprises a gluconolactone, trehalose, sodium sulphate and an organic acid or salt thereof, wherein the pH of the composition is in the range of from 3 to 6.5, preferably from 3 to 5 to protect the internal protein of hair from damage.

13. Use of a hair treatment composition comprising a lactone, a disaccharide, an

inorganic salt and an organic acid or salt thereof, having a pH in the range of from 3 to 6.5, in the treatment of hair, to protect the hair from damage caused by UV light.