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@martin0reg
Going back to black ink in L100/L200/L300 family... if it is dedicated to photo printing or to plain paper? Or maybe in other way - L300 printing in photo mode is CMY or CMYK?
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L300 is using all colors (cmyk) for photos..like most others do...
Like other epson models (e.g. the P50) it has as standard no pigment black for sharp text (canon therefor has PGI bk), all inks are dye.
[edit] So text may not print out as sharp as with canon...but I did no comparison of this yet...
To achieve neutral b&w you can try the so called "black only mode": setting on plain paper and grey and the highest quality .. comes out slightly grainy but totally neutral b&w without any color shift..good gradation too.
In the driver menu, which is very basic, you can choose plain paper, epson matte, epson premium glossy. But there are quality settings and lots of color settings available.
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http://www.epson.eu/ix/en/viewcon/corporatesite/products/mainunits/specs/11858
M100/M200 utilizes black pigment - it is named T7741 (140 ml), 13-15 EUR.
So bulk Epson pigment ink for plain paper is also available.
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Though this is not a printer for me but for office, it is an interesting model and I would like to know how photos on photo paper are coming out..
And how the ciss is working, because pigment ink should be not pulled out from the bottom (as the ciss in the L-series do) Because pigment ink can build up a deposit and should be "shaked before use"...the carts of dedicated pigment printers (like 3880) have their outlets not on the bottom ...
I would like to try pigment black in the L300 for sharper text - but I am not sure how this will cooperate with the dye color inks when printing photos. And beside this it is a ciss with outlets at the bottom...so beware of clogging..