A Microfading Survey of The Lightfastness of Blue, Black and Red Ballpoint Pen Inks in Ambient and Modified Environments | PDF | Color | Ink
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![PDF) A microfading survey of the lightfastness of blue, black and red ballpoint pen inks in ambient and modified environments PDF) A microfading survey of the lightfastness of blue, black and red ballpoint pen inks in ambient and modified environments](https://www.researchgate.net/profile/Bruce-Ford/publication/330130486/figure/fig3/AS:792135670460416@1565871269102/FIGURE-Blue-inks-DE-and-DLchange-at-Mlux-h-exposure-in-air-at-RH-DE_Q320.jpg)
PDF) A microfading survey of the lightfastness of blue, black and red ballpoint pen inks in ambient and modified environments
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![PDF) A microfading survey of the lightfastness of blue, black and red ballpoint pen inks in ambient and modified environments PDF) A microfading survey of the lightfastness of blue, black and red ballpoint pen inks in ambient and modified environments](https://www.researchgate.net/profile/Bruce-Ford/publication/330130486/figure/fig1/AS:792135666253834@1565871268671/FIGURE-Fading-curves-DE-vs-exposure-for-a-representative-set-of-blue-inks-Black_Q320.jpg)