GK Hair Cream Developer provides controlled viscosity for professional bowl-and-brush or bottle application with GK Hair colour and lightening systems. Choose the volume required for deposit, coverage or lift.Benefits Ideal creamy viscosity for even application Compatible with the GK Hair Juvexin Color Line 8 and 10 Vol support deposit-only, demi-permanent and toning services 40 Vol provides up to four levels of lift when used as directed How to useFor standard GK Hair colours, mix one part colour with 1.5 parts developer. For GK Hair super lighteners, mix one part lightener with two parts developer. Apply according to the colour or lightener instructions and process for 30–45 minutes as required. Professional use only.Product details Brand: GK Hair Size: 1000ml Available variants: 8, 10, 20, 30 and 40 Vol Volume guide 8/10 Vol: deposit-only, demi-permanent or toner 20 Vol: up to two levels of lift and grey coverage 30 Vol: up to three levels of lift 40 Vol: up to four levels of lift Explore more: GK Hair range.