Screen E-Book (.PDF) - MacDermid Autotype

Figure 5 shows that the lpi and angle of themoiré changes by modest amounts. In thiscase, then, you will get a non-wavy moiré.Figure 5 The moiré does notchange all that much (e.g.the angle changes from–21.38 to –14.04°) when thethread count changes by amodest amount.Now let’s look at what would happen if youprinted at 71 lpi with a 355 mesh (28/140).Figure 6 shows that small changes in themesh count will give huge changes in themoiré angle. This will look very ugly indeed.Figure 6 The moiré nowchanges by a large amount(e.g. the angle changes from25.62 to 79.88°!) for the samesmall change in mesh count.111