1902 KEVII DE LA RUE INK RECIPES: Queen Victoria profile sample stamps inscribed "De La Rue & Co / London": Four examples for potential £1 and £10 sample colours of black (two shades), green and brown affixed on page from the printers Ink Recipes. Various self-explanatory recording of the production recipes. The reverse of the page bears recipes for Indian postcards and papers. VF, rare. Ex Trotter. Fugitive or doubly fugitive inks were used to prevent fraudulent removal of cancellations and other marks by either warm water or solvents in attempts to re-use the stamp.
