thank you aleksej!
today I did check, not, better, remake my new installation from yesterday.
cups is not preinstalled and I did install it.
after that, it was possible to install one of my two printers, the color printer Canon PIXMA iP4200.
but it was not possible to install the laser printer Brother SL-2035.
To install the second one, it seems to be necessary to install a *.deb package from Brother having the name brhl2030lpr-2.0.1-1.i386.deb.
To do it, I did install the SliTaz package dpkg.
The command
«dpkg brhl2030lpr-2.0.1-1.i386.deb»
did have no success: the system claims «dpkg: error while loading shared libraries: libselinux.so.1: cannot open shared object file: No such file or directory»
where can that library be found?