  We present multicolour broad band ($BVRI$) photometry for a sample of 33
spiral-spiral (S+S) binary galaxies drawn from the Karachentsev Catalogue of
Isolated Pairs of Galaxies (KPG). The data is part of a joint observational
programme devoted to systematic photometric study of one of the most complete
and homogeneous pair samples available in the literature. We present
azimuthally averaged colour and surface brightness profiles, colour index (B-I)
maps, B band and sharp/filtered B band images as well as integrated magnitudes,
magnitudes at different circular apertures and integrated colours for each
pair. Internal and external data comparisons show consistency within the
estimated errors. Two thirds of the sample have total aperture parameters
homogeneously derived for the first time. After reevaluating morphology for all
the pairs, we find a change in Hubble type for 24 galaxies compared to the
original POSS classifications. More than half of our pairs show morphological
concordance which could explain, in part, the strong correlation in the (B-V)
colour indices (Holmberg Effect) between pair components. We find a tendency
for barred galaxies to show grand design morphologies and flat colour profiles.
The measurements will be used in a series of forthcoming papers where we try to
identify and isolate the main structural and photometric properties of disk
galaxies at different stages of interaction.
