To test the overall robustness of the experimental workflow with unknown compositions beyond our characterized model system, 92 different binary compositions of 23 monomers and 4 crosslinkers ranging from 5 to 15 mol% (w.r.t monomer) were printed onto a slide according to our standardized protocol (Figure ). For every composition, six repetitions were randomly distributed throughout the slide to obtain information about process variances and to avoid unwanted bias effects due to potential external influences due to substrate inhomogeneities.