I am most likely taking Boarskin, cleaves and blood with me to the UK for an SD member, so he can train his tracking dog with this.
I bought some 2-Hydroxy-1,2,3-propaantricarbon acid (C6H8O7 / CH2COOHC(OH)COOHCH2COOH) (we sort off call it "citrus acid") to prevent the blood going solid. Looked it up on the internet and apparently you put some in the tube so it stays liquid. Not sure how much i am supposed to put in it. Does any one have any experience with this?