Abstract: In accordance with the present invention, there are provided highly sensitive, water-developable photoreactive resin compositions useful for the preparation of printing plates. Due to the high sensitivity of invention resin compositions, they are particularly useful for preparation of digitally imaged printing plates. Printing plates prepared employing invention compositions are characterized as having excellent exposure sensitivity, the capability of rapidly curing upon exposure, excellent retention of fine details, and excellent colorless performance. Moreover, printing plates prepared employing invention compositions have good clarity and flexibility, excellent washout properties, and retain such properties over extended periods of storage. Once photopolymerized, printing plates of the invention have excellent physical properties, enabling their use in many very demanding flexographic applications.