Buy our knives at: https://www.barbershop-customs.pl/ https://www.barbershop-customs.pl/ In this video we have shown how we made a knife with interesting colours on the blade. Write in comments what knife you'd like to see us making in the future! Our knifemaking jig: https://www.barbershop-customs.pl/product/knifemaking-jig/ FB: https://www.facebook.com/barbershopcustoms INSTAGRAM: https://www.instagram.com/barbershop_customs/ SHOP: https://www.barbershop-customs.pl/ REDDIT: https://www.reddit.com/user/Barbershop_Blades EMAIL: info@barbershop-customs.pl How to blacken steel (hot oxide): A mixture of caustic soda (700g), potasium saltpeter (250g) and water (1,2 l) The temperature of the solution should be kept between 120 - 140 C. I keep the knife inside for about 30 minutes to get consistent black colour, you can manipulate the time to achieve different results, shorter period should give you dark brown or purple - ish colour. Be careful - this mixture is highly corrosive! Heat treatment: -Austenizing temperature: 830 C -Tempering: 180 C Specs: Rainbow Steel: 80CrV2 4mm Length: 240 mm Blade width: 36 mm Blade length: 110 mm Handle: Stabilized wood, brass pins Weight: 220 g "The way I see it, if you want the rainbow, you gotta put up with the rain." ~ Dolly Parton Music: Track: Yusuf Alev - Yoros Music Provided by Magic Records Lotus Lane by The Loyalist - Preconceived Notions Creative Commons — Attribution 3.0 Unported— CC BY 3.0 Track: Jorn L - The Bass (Magic Free Release) Music Provided by Magic Records Listen To The Original: https://www.youtube.com/watch?v=gWgkP_fyI6s Free Download: https://fanlink.to/theBass Track: TH3 DARP X Godmode - Samurai Music Provided by Magic Records Listen To The Original: https://www.youtube.com/watch?v=03IHBrdhgaw Free Download: https://fanlink.to/b6VM #knifemaking #bushcraft #camp