I worked in printshops and also as a maintenence mechanic for printing
equipment.
there was a product around called rubber rejuvinator. it was intended
for use on the rubber blankets and they are expendable. the rollers
have a replacement life , which varies , there are lots of variables.
some printers would read the bottle and think it would rejuvinate their
rollers.. some of them swore by it, it does leave them looking more
resilient.
the size of the rollers is usulally important as well. they tend to
shrink with age and they swell from the solvents used to wash up the
ink. the ends swell more because the solvents can attack from the end
of the roller as well as the outside surface. the rollers generally
need to be replaced when the ends get larger than the rest of the
roller , but a couple or maybe 10 thou.
we made good money replacing rollers , especially the ones whjo loved
rejuvinator..
some loved it for the smell ,, it did get you high !
another product used is "blanket fix" this stuff is used to swell the
blanket , which gets damaged when paper crumples up and still goes
through folded up. it is a quick fix so they don't need to change the
blanket , they can wait till later..
anyway may said the "secret" ingredient is paint stripper , and many
just bought that instead. blanket fix swells the rubber just like the
rubber rejuvinator, to a lesser degree.
either product basically makes the rubber deteriorate faster, it does
give a resilient surface for a while.. but it isn't a long term fix.
other products were for basically grinding the rubber.. products
like "putz pomade" could be added to the roller train then the press
could be left to idle for a while ,, they had abrasives in a paste,,
they did remove a bit of the surface material. also left some grit
embedded in the rollers.
the only real fix is new rubber.
Phil