Crazy Color is a high pigment semi permanent, it is just colour molecules in a conditioner base, no alkaline agents nor peroxide nor persulphate bleach so are not damaging at all. Similar products include Manic Panic and La Riche Directions (depending which country you are in).

To me box dye is a permanent colour, that will be damaging even if it contains no ammonia, these use peroxide and an alternative alkaline agent which is just as damaging as ammonia but less stinky.

TBH I am confused as to what you want, if you only want a tint and are happy with a dark result there is no point in damaging your hair lifting with double process box dye and then redarkening with the purple. Just use a semi permanent as that video did, these can safely be left on for a couple of hours to overnight for a stronger or more long lasting shade. You will get a better result if you don't have naturally low porosity hair. The porosity is more important than how light or dark your hair is, the more porous your hair the lighter the shade you can choose, it will 'build up' to a darker shade the longer you leave in on your hair.

These type of semi permanents are often done over pre-lightened hair because many users want a strong/ bright result - this does not have to be persulphate bleached, I use a weak peroxide only blonde box dye to increase porosity more than lift the colour. But the colours will still take on virgin hair, anything that is not super low porous and resists everything. Be sure to prep by using something that will encourage the cuticle to lift - maybe soap, baking soda or a harsh clarifying shampoo. You should have no oils, butters, silicones etc on your hair.

IMO purchase a good high pigment semi permanent and practice on shed plughole virgin hair before even thinking about damaging your hair with permanent dyes. Leave the longest hairball overnight, maybe even experiment with a little heat (dryer or heat cap), always cover with a shower cap after you have applied to keep the product damp and use the heat of your head.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond/ fractionated coconut oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Au Naturale styling gelee
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect

Last edited by Firefox7275; 08-13-2013 at 05:31 AM.