Hiya

I've just booked a client in for tomorrow. She had sienna x 16% last time and wants same again. I've just checked my solution thinking I had enough and I haven't. I've got about 30ml of 16%. I have 8/10/12%. Can I mix any to make a 16% x

I've just booked a client in for tomorrow. She had sienna x 16% last time and wants same again. I've just checked my solution thinking I had enough and I haven't. I've got about 30ml of 16%. I have 8/10/12%. Can I mix any to make a 16% x

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