Toner Formula: Level 7 to 7, Cooling a Brassy Medium Blonde

Steps

Rinse the lightener until the water runs clear and towel the hair until it stops dripping, even from root to end.

Dry one section from the mid-back and check it at the window: yellow-orange with no clear orange at the root is a 7.

Weigh 40 g of 7.12 and 80 g of 10 vol, or the tube's own demi ratio. Mix to one even lilac-gray cream.

Apply mid-lengths first, then roots, ends last, fast enough that the first section is never ten minutes ahead of the last.

Wipe a strand at 10 minutes. Rinse at 15 on normal hair, 20 on coarse or resistant hair, or the moment the ends look flat.

Rinse cool, condition, and dry a section fully before you judge; wet, it reads a level darker and grayer than it will be.

From the chair

7.1 on its own carries no violet, leaves the yellow half of the pigment alone, and the ends drift green within a week. If the brand has no .12, mix three parts 7.1 to one part 7.2.
Work in four sections with the bowl on the cart. Getting the whole head covered in under five minutes matters more at 7 than it does at 8.
The wet result looks two shades too cool and slightly gray. Dry it before you say anything to the client.

Every 7 that comes to my basin arrives the same way: lightened from a 5 or a 6, rinsed, and yellow-orange in the towel. The level 7 page covers how the hair got here; this page is the twenty minutes after.

Minute 0: damp hair, lilac-gray bowl

Towel-dried until it stops dripping and no further; dry hair grabs the cream where the brush lands first, and dripping hair waters the developer down. In the bowl, 40 g of 7.12 and 80 g of 10 vol, or the demi ratio on the tube; the developer mix calculator does the sum for odd ratios.

Blue cancels orange and violet cancels yellow, and a 7 has both, so the shade needs both. 7.12 carries them in one tube. 7.1 alone has only the blue: it handles the orange half, leaves the yellow, and the ends drift green by the second wash. I have never liked a 7.1 on lifted hair; in my chair it is 7.12, and I know colorists who disagree.

Ten volume, because a toner deposits and the level stays where the lightener left it.

Minute 5: it looks like a mistake

The cream goes a dirty khaki within a couple of minutes, the yellow-orange showing through a translucent lilac. Nothing is wrong. On normal hair there is nothing to check at 5; I use the time to wipe down the cart. On hair lightened twice, wipe one end at 5, and if it already reads flat and cool, rinse the ends and leave the rest.

Minute 10: wipe a strand and take it to the window

A damp towel, one strand. Under the window (the basin lamp is warm and lies in the client’s favor) the yellow-orange should have gone dull, a wet sand. Clear orange at the root means a 6 the 7.12 will not catch; note it for a 6.1 pass next visit. I once misread a root under the basin lamp, called the whole head a 7, and sent a woman home with cool lengths and a warm halo an inch wide. The fix, three days later, took 30 minutes and 20 g of 6.1 I did not charge for.

Minute 15: gray in the bowl, and why that is fine

Wet 7.12 on a lifted 7 reads gray. Properly gray, and the leftover cream in the bowl has gone the same. Wet hair reads a level darker, and the violet and blue over yellow-orange read a step cooler with it. Rinse cool and condition, then dry a section fully before either of you says a word, because dry, the same section is a cool medium blonde with the brass gone, a shade deeper than the wet gold at minute 0. But clients see the gray in the bowl and worry, and I have found it easier to warn them at minute 0 than to explain it at 15. Some still worry.

Minute	On the hair	In the bowl	What you do
0	Damp, yellow-orange	Pale lilac-gray cream	Apply, ends last
5	Khaki sludge	Same	Nothing; wipe a porous end
10	Dull sand, gold gone	Darkening	Wipe a strand, judge at window
15	Wet gray	Gray	Rinse on normal hair
20	Wet gray, no change	Gray	Rinse; past this the ends go steel

Minute 20 and past it

Coarse hair gets the last 5 minutes. After 20 the violet keeps depositing on the most porous ends, which go a steel gray that looks fine wet and awful dry; two or three clarifying washes take most of it back. What I cannot give you is the exact minute for a head with three years of different porosities in it; on those I go by the wiped strand, and the processing time calculator gives a starting point.

Dry it before you judge it Wet, a toned 7 reads one level darker and one step cooler than it will be. Every gray complaint I have had at this level was a wet complaint.

The week after

Four to six weeks. The violet fades ahead of the blue, so yellow shows at the ends by week three and warmth at the root by week five. Cool water stretches it; a pool shortens it. At week five the same 7.12 for 5 to 10 minutes puts it back, and the toner selector may hand you a 7.2 for that gloss if the fade is pure yellow. If she wants lighter after all, lift to 8 and use the level 8 to 8 formula.

Asked at the basin

It looked gray in the bowl and gray on the hair. Did I over-tone?

Probably not. A 7.12 is a lilac-gray cream, and on wet yellow-orange hair it reads as gray until it is dry. Rinse at 15 or 20, dry a section fully, and judge then; if the dry hair is still gray, one clarifying wash pulls it back.

Does plain 7.1 work at level 7?

On a true, even 7 it can, but the pigment at 7 is yellow-orange and 7.1 only carries blue. The blue handles the orange half and leaves the yellow, and blue over yellow drifts green at the porous ends within a week. The .12 has violet built in for the yellow, which is why it exists.

Will this make my hair lighter?

No. A demi toner deposits and cannot lift, so the depth after the lightener is the depth you keep. If the goal is a light blonde, the hair needs another lift to 8 or 9 after a rest, then the toner for that level; the toner selector shows what each level can carry.

How long before the brass comes back?

Four to six weeks. The violet fades first, so the ends turn faintly yellow before the roots turn orange. A five-minute gloss with the same formula at week five resets it.