Page 42 - HAIR COLOUR
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Close the packet and monitor the changes in colour and how long they
take. It is possible to run two strand tests at the same time in two separate
Visi-Colors, one with 20 volume mixes and one with 30 volume mixes.
(Fig 34.)
Once the strand tests are washed off, if you decide not to bleach, then the
blonde strands are hidden underneath the rest of the hair.
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