Observed Balmer jump of the η Cha cluster members (filled symbols) and non-accreting PMSs from Manara et al. (2013b), which were used as templates in this work (black empty circles). The black dashed line highlights an observed Balmer jump of 0.5. The shape and color of the filled symbols highlight the SED classifications from Sicilia-Aguilar et al. (2009): black stars denote Class III objects, red circles Class II objects, green triangles transitional objects, the blue inverted triangle the transitional/flat object J0841, and the orange box the flat source J0844.