Some limited pigment analysis was carried out on the cartoons. This was done particularly in areas of the cartoons that appeared to have changed colour. One of the main colours used by Raphael was red madder lake either on its own or in combination with other pigments - particularly with blues to give purple. Unfortunately madder lake is very susceptible to fading causing changes to the original appearance of the cartoons. A well known example of this is the cloak of Christ in The Miraculous Draught of Fishes which now appears white although the reflection is red. Analysis showed that the cloak had been painted in red madder lake - now faded - but the reflection was painted using the more stable pigment, vermilion.