The cheap brayers (hard, diameter 2,5 cm) will most of the time not slide
if you use just a little ink. For a fine print result less ink is also
better than a thick layer (but you have to press harder). It also depends
on the type of ink. Oil base inks are more "sticky" than water base and
therefore slide less. Last, it also depends on the way you move the brayer.
Come with a rolling move of your hand to the plate. Some children put the
brayer fast on the plate first and try to move it than. If the brayer tends
to slide, it will surely do that way.
All this also for brayers with a bigger diameter (mostly red and softer and