We keep the Auro colour concentrates in stock in the 250ml size. They do also come in a 500ml and a 2.5L size so if you would like to know more please ring us and we can quickly get them into stock for you.
The colour swatches shown for the Earthborn pigments (NB as usual, these are just a guide) are taken from the official Earthborn chart which shows 75g of each pigment mixed with 1 litre of Earthborn Just White Claypaint. Their old charts (there are still some of them on the web) used to be pigment mixed into Earthborn Wallglaze so they looked a lot stronger. It is, of course, quite OK to mix the pigments into either a glaze or a varnish to achieve a very intense colour.