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Analog audio recording
Published in John Watkinson, The Art of Sound Reproduction, 2012
Print-through is a phenomenon where the recorded signal affects adjacent layers of tape on the reel and is normally evident as a series of pre- and post-echoes of a transient. Cobalt-doped tapes are significantly worse offenders especially at high storage temperatures. Print-through is greater to layers in the direction of the tape coating, leading to stronger pre-echoes in a conventionally wound open-reel recorder. In the Compact Cassette the tape is wound coating outwards, leading to stronger post-echoes. Post-echoes are less obvious which is just as well given the very thin substrates of cassette media.
Particle-free compositions for printing dense 3D ceramic structures by digital light processing
Published in Virtual and Physical Prototyping, 2021
Tamar Rosental, Sapir Mizrahi, Alexander Kamyshny, Shlomo Magdassi
The large light penetration depth that characterises the present printing compositions, also leads to additional exposure for features facing downwards, ‘print-through’, which produce thicker features in the z-direction (Lynn-Charney and Rosen 2000). The accuracy in the z-axis is commonly addressed by increasing the light absorbance of the composition by the addition of dye (Gastaldi et al. 2021). In the present study, several dyes were tested, and Sudan Orange (SO) was found to be the optimal one. Therefore, its effect on the resolution in the z-axis was studied. Printing compositions containing 0–0.006 wt% SO were used for printing porous cubes (Figure 7(a)) and the dependence of its features’ width on printing orientation (perpendicular or parallel to the printed layers) was used as an empirical evaluation tool for determining the degree of print-through. As shown in Figure 7(b), a reduction in z print-through is observed for printing compositions with SO content as low as 0.006 wt% (Figure 7(c)).