Polymerization times for different film thicknesses of GelMA and GelMA/DbPE hydrogels were determined by a stepwise curing test. Different volumes of precursor solution (50, 100, 200, 300, and 500 µl) with 0.3 wt% LAP were added to a well of a 96-well plate and irradiated with UVvisible light (320-500 nm, 500 mW•cm -2 ) for photocrosslinking using the Omnicure S2000 curing system (igb-tech GmbH, Friedelsheim, Germany). Curing was checked visually every 5 s with a pipette tip to evaluate hydrogel formation.