Double Black is a carbon based black that is stronger than Eyeliner Black.
If you like carbon-based blacks and want darker than Eyeliner Black, this is the pigment for you. 
Opacity Level:  
High 
What it is: Hand-crafted pigment for your most inspired eyeliner looks. 
Why you’ll love it: Our unique blend of the highest quality pigments, with the absolute best ingredients, ensures maximum color concentration for lasting, true results that never shift or change.  
What you need to know: Perfect on their own or blended to create a custom shade, each eyeliner pigment is designed to enhance your client’s natural beauty. Our team tests every batch for consistency and safety, so you never have to worry about nasty additives, or how our colors will show up in your clients’ skin. Ethically made and ethically tested, Perma Blend is certified vegan and cruelty free. 
Directions for use: All carbon-based eyeliners should be used with caution by experienced artists only. Do not mix with water or other thinning agents. To change consistency, only use Perma Blend Thinning or Shading Solutions.