Dry toner for direct electrostatic printing (DEP)

A method for direct electrostatographic printing (DEP) on an intermediate substrate or on a final substrate, using a device that comprises a back electrode, a printhead structure comprising a control electrode in combination with apertures, and a toner delivery means for presenting a cloud of dry toner particles in the vicinity of said apertures, wherein

• (i) said toner particles are such that the ratio of the length of the long axis of the projected microscopic image of said particles to the length of the short axis is between 1.00 and 1.40, said ratio being the average of the ratios measured on at least 20 different toner particles
• (ii) said toner particles after addition of 0.5% by weight of fumed hydrophobic silica having a specific surface area of 260 m.sup.2 /g show a ratio of apparent density (.rho..sub.app) over real density (.rho..sub.real) ##EQU7## (iii) said toner particles having a ratio between measured BET (BET.sub.meas) and calculated BET (BET.sub.calc) of ##EQU8##