Merlin's Original Recipe
The original magical "Retr0bright" gel mixture that was found to work is:-

1 pint (500ml) Hydrogen Peroxide, 10 to 15% strength (40 vol) (available from hairdressers' supplies, e.g. the 'Sally Beauty' franchise in the UK)

2 heaped tablespoonfuls of Xanthan Gum (available from health food shops or online)

1 level teaspoonful of Glycerine (available from pharmacies)

1/4 teaspoonful of "Oxy" laundry booster

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