I don't know if this happens when printing by hand or on a machine, but it does happen from time to time on my one arm on the flood, and it is driving me crazy trying to figure out what causes it or the quickest way to eliminate it.
When I go to pull my flood stroke, the squeegee chatters, and makes these little ridges across the print. It definitely happens sometimes when I add new ink. this ink is usually thinner.
Sometimes it goes away after one or two pulls, sometimes it stays around, then all of a sudden goes away and the squeegee is gliding across fine.
I've usually done a couple of thick floods by this time. Almost like the ink needs to be broken in. changed squeegee angle, that doesn't seem to change anything.
Any ideas? has this happened to you?