nitric acid
A dilute acid used with gum arabic to etch lithographic stones. Strengthens the chemical differentiation between image and non-image areas, making the stone more ink-receptive in drawn areas and more water-receptive in blank areas.
A dilute acid used with gum arabic to etch lithographic stones. Strengthens the chemical differentiation between image and non-image areas, making the stone more ink-receptive in drawn areas and more water-receptive in blank areas.