Photosensitive mixture for producing relief and printing plates

A photosensitive mixture consisting essentially of

• (a) at least one block copolymer of styrene, butadiene and/or isoprene,
• (b) at least one photopolymerizable olefinically at least monounsaturated organic compound,
• (c) at least one photoinitiator, and
• (d) at least one dye,
• wherein said dye (d) comprises at least one azo dye of one of the general formulae (III ) to (V) ##STR5## where R.sup.7 =H, CH.sub.3, COOH, COOR where R=C.sub.1 to C.sub.12 -alkyl, OCH.sub.3 or NO.sub.2,
• R.sup.8 =R.sub.8 =H, ##STR6## R.sup.9 =H, CH.sub.3, NO.sub.2 or SO.sub.3 H, R.sup.10 =H or OH,
• R.sup.11 =H, OH, NH.sub.2, NHR or NR.sub.2 where R=C.sub.1 - to C.sub.12 -alkyl,
• R.sup.12 =H, C.sub.1 - to C.sub.12 -alkyl or SO.sub.3 H.