Why are Pigment Spots Different Sizes?

AI Thread Summary
Pigment spots vary in size due to differences in the amount of pigment applied to the paper, which directly influences their area. The movement of pigments via capillary action can also affect how they spread, leading to variations in size. Even slight differences in the volume of pigment droplets can result in noticeable differences in spot size. Factors such as the viscosity of the pigment and the porosity of the paper may further contribute to these size discrepancies. Understanding these dynamics is crucial for predicting pigment behavior on porous surfaces.
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1. Why are some pigment spots larger (area and volume) than others?


I understand that pigments move up the porous paper by capillary action, from research. But why are some pigment colours (areas) larger? THanks
 
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I'd think the area being larger would mostly imply more of the pigment was placed on the paper. I imagine a very small volume of difference between drops of two pigments would cause a still noticeable difference in the size of the spots.
 
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