The two Starter set options are largely similar with the main difference being one option contains 5ml bottles, the other 10ml bottles. However each does have a slightly different contents. 
 
The 10ml Kit contains 4 x Unmodified Natural Inks and 4 x Modifiers. The modifiers included are: Soda Ash, Iron Sulphate, Copper Sulphate and Aluminium Sulphate.
The Inks Included are: Horse Chestnut, Alder Cone, Elderberry and Sloe. 
 
the 5ml Set Contains: 6 x Unmodified Natural Inks and 4 x Modifiers. The modifiers included are: Soda Ash, Iron Sulphate, Copper Sulphate and Aluminium Sulphate.The Inks Included are: Horse Chestnut, Alder Cone, Elderberry, Sloe, Oak Gall and Nettle.
 
What is a modifier? 
A modifier is a material you use to shift the PH content of the ink you're using which are a result shifts the colour. These are natural elements, often metal based e.g. Aluminium sulphate, Copper sulphate, Iron Sulphate. A great example of their use is Iron Sulphate when combined with the Alder cone, it will shift into a beautiful black. The Soda Ash when combined with the sloe, will turn an incredible green, then as this oxidises will shift into a murky brown ish orange. 
 
If you're looking to introduce yourself to experimenting with Natural inks or have any arty enthuistants who appreciate a gift they can play endlessly with. This is a lovely option. This is great for anyone who is an expert in what they do, or anyone just starting out, it comes with everything you might need in beautiful handmade detail. Within the Natural Ink Section on my website you can find a step by step/ general guide on how to use the kit.