Throughout history discoveries have been made unintentionally. The English metallurgist Harry Brearley discovered stainless steel by accident and Alexander Flemming's accidental discovery of penicillin change the course of medicine.
On a more humble level my experiments in colouring fabric have led, by accident, to the discovery of an amazingly resilient colourant. To mark out a pattern on white voile I used a stick of yellow pastel in the belief that it would wash out afterwards. After all, pastel is the most difficult of all artists' media to preserve. But try as I may, my yellow lines would not wash out. This led me to try working designs directly in pastel.
The opening picture is a selection of attempts ranging from batik to painting with the dyes you see on the pallet. The picture below is of a design first sketched with a permanent black marker and then coloured with pastel.