Originally Posted by
Photomagica
I think the HP "spray protection coating" refers to the Gloss Enhancer. Unlike the Epson, which combines a gloss modifier with the inks themselves, the HP provides an additional cartridge that applies a very, very thin clear coat. On glossy RC papers you can actually hold an HP print under the tap with no ill effects! Some soft drink got splattered on a proof on Espon Premium Lustre and I was about to throw it out. Instead I tried gently wiping the spots off with a wet tissue. They came right off with no artifacts.
This is a standard feature on the HP z3100 and z3200 printers. While I don't use extremely glossy papers, a roll of RC high gloss came with the printer and I did a lot of proofing on it. I'd describe the result on the z3100 as the closest thing that I've seen to glossy Ilfochrome coming out of a pigment printer.
While no printer that I've seen entirely eliminates gloss differential, the current HPs and Epsons are so good they make this mostly a non issue. If you are really picky about gloss differential, different papers respond differently on the various printers, so some testing is required to find an optimum combination. I haven't spent enough time with the Canon to from an opinion about its abilities to handle gloss differentials.
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