Digital BW, The Print

> Hi folks,
>
> Even though the level of expertise of the contributors to this list is
> very high, there may be others who, like myself, are just getting
> started. I recently received an explanation of pigment vs. dye from a
> company that sells ink, including WJ1082 (aka Eboni K). The  
> explanation
> helped me to understand more clearly; perhaps it will help others. I
> asked him for his permission to post it here. I have no affiliation  
> with
> Mr. Lewis, except as a potential customer.
>
> Andrew
>
>
> BEGIN QUOTE
>
> The dye in the dye-based ink dissolves in water like sugar does
> in water -- completely.  Pigment does not dissolve completely. It
> is more like a flour and water mixture.  Because of this,
> dye-based inks flow better and have been the standard in inkjet
> printers. But the dye will re-dissolve and the ink will flow
> across the paper if drops of water hit the paper.
>
> Pigmented ink particles tend to settle into the tiny fibers that
> make up the paper.  As the ink dries, the pigment particles get
> stuck in the fibers. Thus, the pigmented inks are more water
> resistant than the dye-based inks. Only about 5 to 10 percent of
> the ink will re-flow if the paper is hit by water.
>
> The molecules in dye-based inks are spread out. You might think
> of dye-based ink on paper as similar to a beach covered with
> sand. Because of this, dye-based ink tends to fade quicker, since
> all of the molecules are exposed to the chemical and
> sunlight-caused reactions that fade the ink. You may notice
> fading of dye-based inks exposed to direct sunlight commonly in 6
> to 12 months.
>
> Pigment particles are similar to large pebbles on a beach. It is
> much more difficult for sunlight and chemicals to react with all
> of the pigment molecules, since most of them are hidden inside
> the "pebbles". Pigmented inks will usually last for many years
> before fading becomes noticeable.
>
> It is possible to get more "color" into pigments than into dyes.
> Therefore, pigmented colors tend to be more vibrant than
> dye-based colors. And pigmented black inks tend to be slightly
> darker than dye-based inks.
>
> Sincerely, Gordon Lewis
> The Printer Filling Station
> www.PrinterFillingStation.com
> 1403 Shiloh Oak Drive
> Loganville, Georgia 30052
> Office 1-800-404-4923
>
> END QUOTE
>
>
> ------------------------------------
>
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>

>
> Hi folks,
> 
> Even though the level of expertise of the contributors to this list is
> very high, there may be others who, like myself, are just getting
> started. I recently received an explanation of pigment vs. dye from a
> company that sells ink, including WJ1082 (aka Eboni K). The explanation
> helped me to understand more clearly; perhaps it will help others. I
> asked him for his permission to post it here. I have no affiliation with
> Mr. Lewis, except as a potential customer.
> 
> Andrew
> 
> 
> BEGIN QUOTE
> 
> The dye in the dye-based ink dissolves in water like sugar does
> in water -- completely.  Pigment does not dissolve completely. It
> is more like a flour and water mixture.  Because of this,
> dye-based inks flow better and have been the standard in inkjet
> printers. But the dye will re-dissolve and the ink will flow
> across the paper if drops of water hit the paper.
> 
> Pigmented ink particles tend to settle into the tiny fibers that
> make up the paper.  As the ink dries, the pigment particles get
> stuck in the fibers. Thus, the pigmented inks are more water
> resistant than the dye-based inks. Only about 5 to 10 percent of
> the ink will re-flow if the paper is hit by water.
> 
> The molecules in dye-based inks are spread out. You might think
> of dye-based ink on paper as similar to a beach covered with
> sand. Because of this, dye-based ink tends to fade quicker, since
> all of the molecules are exposed to the chemical and
> sunlight-caused reactions that fade the ink. You may notice
> fading of dye-based inks exposed to direct sunlight commonly in 6
> to 12 months.
> 
> Pigment particles are similar to large pebbles on a beach. It is
> much more difficult for sunlight and chemicals to react with all
> of the pigment molecules, since most of them are hidden inside
> the "pebbles". Pigmented inks will usually last for many years
> before fading becomes noticeable.
> 
> It is possible to get more "color" into pigments than into dyes.
> Therefore, pigmented colors tend to be more vibrant than
> dye-based colors. And pigmented black inks tend to be slightly
> darker than dye-based inks.
> 
> Sincerely, Gordon Lewis
> The Printer Filling Station
> www.PrinterFillingStation.com
> 1403 Shiloh Oak Drive
> Loganville, Georgia 30052
> Office 1-800-404-4923
> 
> END QUOTE
>