Equal parts of 30 volume + 40 volume developers= 35 Volume Developer.
3m (Vol is 3x3x3 = 27)
Vol = 2*1*3 cm3 = 6 cm3
Vol = 10 cm * 5 cm * 40 cm = 2,000 cm3
Vol = Pi/4 x D2 x HorVol = Pi x r2 x HwhereD = diameterorr = radiusandH = height
Volume of a cylinder is easy: Vol= [(pi) x radius^2] x height of cylinder] Where Pi= 3.1416 approx and radius = 1/2 of cylinder diameter The volume of a prism is complicated because it depends on the type of prism. for a regular shape prism the formula is : Vol = (area of base) x height If the prism is a "union" of differents shapes, you have to split the prism in smaller/single/easy shapes and calculate the volumes individually and then add the resulting volumes
No, diluting a 30 vol hair developer with water will not change the volume strength of the developer. To make a 20 vol developer, you would need to mix the 30 vol developer with a neutralizing solution or a lower volume developer.
Yes. 10 vol developer is 25% peroxide.
Mix equal parts of the 10 vol. and 20 vol. developer to create a 15 vol. developer solution. This will give you a balanced formula that combines the properties of both developers to achieve the desired volume strength.
30 vol is stronger
10 volume is if you want to go dark with color but with bleach 10 vol gives you one level of lift but if it seems slow to you use 20 volume, never use 30 vol or 40 vol on scalp it will irritate it.
I would like to substitute 9 vol for 20 vol fit grey coverage
Yes, this will work, but I recommend using 20 volume developer instead of 30 volume and watch the hair closely.
20 vol is what ya need for color it has "regular" lift just enough to deposit color...30 vol is "extra" or high lift for a more extreme lightening. Be very careful using 30 vol on scalp it is very strong stuff :)
I am talking about hair developer
Developer of any volume won't do much of anything by itself. It will need to be mixed with a lightener and yes, it will be suitable for your needs once it is mixed with a lifting agent.
particularly, yess. it depends on what hair dye it is for the vol. of the developer. but, MOST hair dyes, require 20-30 vol. happy hair dyinng.
20 vol