I purchased a Epson Xp-55 printer with Claria Photo HD ink. This ink is claimed to have very high density and high resistance to UV light.

I have made a test pattern with a gradient from Red to Blue to Green, to Yellow
I also made a dense black test pattern. In addition I made a dense blue and a dense yellow pattern.

Do anyone on this group / list have any experience with what color that blocks the UV radiation best? I heard that it may be a combination of Y Red and Green (yellow), but I am not sure.

A clarification about inkjet printing: the inks are not RGB, they are CMYK. Cyan, magenta, yellow, and black. Six color printers add a photo magenta and photo cyan, which are simply paler inks. A seven color printer adds a photo black.

The colors most prone to fading often have UV inhibitors added - so yellow, and photo magenta and photo cyan. Dye inks work better than pigmented, presumably because dye inks require more UV blockers to protect them. Some have reported the black ink in their particular printer blocks UV fine, most have reported that printing light green to get a mix of yellow and photo cyan works best.
/g/homebrewpcbs/message/6596

Of course, the actual inks used depend on not only the shade you set, but in the printer driver which converts RGB to cCmMYkK and in the settings therein. So you'll need to do some experimenting. Do you know what stepped exposures are? AKA "transmission step wedge"?
/g/homebrewpcbs/message/22498?p=,,,20,0,0,0::relevance,,inkjet+block+uv,20,2,20,21358479

I think to get the driver to use the photo inks, you must set the paper type to photo paper. See the first link above, it is quite detailed.

Regular inkjet transparency films are not necessarily the best for this. In the screenprint trade, inkjets are used to make transparencies as the screens are coated with a UV exposeable coating. There are transparencies made specifically for this that are made to accept a very heavy ink load. They are not the standard overhead projector transparency, these look like vellum.

Try Jetstar and Silkjet.
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I highly recommend the search function here on 开云体育, unlike the Yahoogroups search engine, this one actually seems to work! Then there is just the little bugaboo of knowing what search terms to try...

--
Steven Greenfield AE7HD

On 29/06/18 22:19, Steven Greenfield AE7HD via Groups.Io wrote:
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Regular inkjet transparency films are not necessarily the best for this. In the screenprint trade, inkjets are used to make transparencies as the screens are coated with a UV exposeable coating. There are transparencies made specifically for this that are made to accept a very heavy ink load. They are not the standard overhead projector transparency, these look like vellum.

The UV films with a slightly tacky surface are gelatine coated.

The gelatine only absorbs dye ink, because the dye ink has no solid particles in it. The pigment ink *has* got particles, and will not dry.

I'm using an Epson Artisan 1430 which uses dye ink.
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On 29/06/18 22:19, Steven Greenfield AE7HD via Groups.Io wrote:
...

Regular inkjet transparency films are not necessarily the best for this. In the screenprint trade, inkjets are used to make transparencies as the screens are coated with a UV exposeable coating. There are transparencies made specifically for this that are made to accept a very heavy ink load. They are not the standard overhead projector transparency, these look like vellum.

The UV films with a slightly tacky surface are gelatine coated.

The gelatine only absorbs dye ink, because the dye ink has no solid particles in it. The pigment ink *has* got particles, and will not dry.

I'm using an Epson Artisan 1430 which uses dye ink.
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I just made a new double-sided pcb yesterday and can start testing the circuit today.

So china doesn't solve everything.

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The question is mostly related to what ink color on the Claria range is most blocking to UV not about film. I use Jetstar.

So far black looks best ... but did I actually print with Light Cyan and Light Magenta?

How can I print with PURELY one of the colors at a time with my Epson printer? In gimp there seems to be no setting for LC and LM.... ?Claria ink in my XP-55 has LC and LM in addition to C M Y K color cartridges ...

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URL?

??

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