Hydrated chromium oxide green
Green.
Opens the calculator’s starter recipe with this additive in it. Nobody has published what a spoonful weighs, so weigh it and enter the grams.
What it is
Hydrated chromium oxide green is a green pigment powder, the hydrated form of chromium oxide, and like the other oxides it is mixed well with oil before it goes in.
Wholesale Supplies Plus supplier or guide
How much
- 1 tsp per pound of oils filled in Mad Micas supplier or guide
The calculator suggests 1 tsp per pound of oils, but nobody has published what a spoonful weighs: weigh it and enter the grams.
When and how
- Usually: at light trace.
- Mix it first with a little of the recipe’s oil, about a teaspoon of powder to a tablespoon of oil, so it spreads without specks.
Wholesale Supplies Plus supplier or guide
What it does to the recipe
- It changes neither the lye nor the water: it is only weight in the bar.
Worth knowing
- Too much colours the lather. Lovin Soap supplier or guide
Spoons and drops
- No source weighs a spoonful of it: weigh it.
INCI name
CI 77289 (Colour Index number)
- CAS number
- 1308-14-1, 12001-99-9
- EC number
- 215-158-8
- US colour additive name
- Chromium Hydroxide Green
Guides that discuss it
Sources
Wholesale Supplies Plus, soap colorants guide: titanium dioxide is "prized for its dense, white opacity", and "A single teaspoon is sufficient to lighten one pound of soap"; "half of this amount or even less for brown oxide and red oxide"; oxides "must be thoroughly mixed with oil before use"; micas offer "a spectrum of bright hues"; ultramarines have "potential to emit sulfurous odors".
Mad Micas: "1 tsp per pound of oils" for its red iron oxide, ultramarine blue and green chrome oxide; "Stable in high pH".
Lovin Soap, colouring soap: pigments "color lather if too much is used"; natural colourants "do tend to fade".